form a linear equation in two variables
Get Variables
An Applescript that shows a list of variables from the Script Editor document more>> You can use Image Viewer application to view the image files on the Mac, rotate and convert them to numerous vector and raster formats including PDF, EPS, JPG, GIF, TIF, PSD, PICT, PNG, BMP, and SGI.
You can navigate through the images in a folder using navigation keys and keyboard shortcuts. Changing the view size allows to view at different zoom amounts.
Also you are able to rotate selected Image file.
To convert an Image File, choose one of the export formats and select Convert option or press button. The export resolution can be changed under HomeImage Viewer Drawer Preferences. You may set also the default destination format, and the default location for the converted files.
Application is free software for Mac, you can use it absolutly free. This application is for free software download.<<less
Four Variables 1.1
Four Variables is designed as a free pre-algebra investigation for students in grades five through nine. more>>
Four Variables 1.1 is designed as a free pre-algebra investigation for students in grades five through nine. The program secretly assigns values to four variables (w, x, y, and z) and the student must find these values by requesting the computer to perform operations with the variables.
For example: the student might ask the program to divide x by z; the program would respond "x/z = 0.875." The are two different investigation types: one where all four operations are allowed, and one where only division is allowed.

Wallpaper Set Two: Zorb Studios 2.0
Bright, colourful wallpaper sets, Including Apple Set 4 and other vibrant desktop images. more>>
The second set of wallpaper images released by Zorb Studios. They are free to download and share, but please do not use them commercially! The set includes 18 images and Apple Set 4. Pack includes each design in a variety of colours, each as bright as the other! Please download and enjoy! Thanks.
PDF Equation 0.7
PDF Equation - Quick access to LaTeXs typesetting power more>>
Just type a LaTeX snippet, render a it and drag the resulting PDF file into your Keynote presentation or wherever you need it. PDF Equation is document-based, so you can save your equations for later use.
Enhancements:
- Adds a color well and a customizable LaTeX preamble.

Environment Variable Preference Pane 1.2
System Preferences plug-in for setting global environment variables. more>>
This is a System Preferences plug-in that enables editing of the environment variables that are set when you login to Mac OS X.
Graphing Calculator Viewer 1.5b3
Graphing Calculator Viewer is a tool which can view and interact with Graphing Calculator documents. more>>
Major Features:
- 2D curves
- 3D surfaces
- Inequalities
- Save movies
- Save for Web saves HTML & PNG files
- Save as RTF export to word processors
- Acts as a web helper application
- Polar, cylindrical, spherical coordinates
- Define functions and variables
- Piecewise defined functions
- Complex number arithmetic
Enhancements:
- Multiple equations
- Implicit curves and surfaces
- Parametric curves and surfaces
- Contour plots
- Density plots
- Color maps
- Coordinate transformations
- Vector fields in two and three dimensions
- Curves and surfaces in four dimensions
- Ordinary differential equations
- Direction fields
- Functions of complex variables
- Interactive complex parameters
- Complex parametric curves
- Conformal mapping
- Complex surfaces
- Mac OS X 10.4 or later.
Merge Two Contacts 1.0
Merge Two Contacts - Merge contacts with identical names more>>
Put Merge Contact with vCard script into the Entourage Script Menu Items folder in the Microsoft User Data folder in the Documents folder of your user folder ("Home") in the Users folder on your OS X hard disk.
Equation Compiler Plugin 3.1
Equation Compiler Plugin - Compile string into machine language for rapid evaluation more>>
Only two functions are needed for the plugin. They are compile() and evaluate(), both of which can take a variable number of arguments.
The compile() function can take from 1 to 7 arguments. The first is the function text. The remaining are the string names of the user variables. Their order defines how the plugin uses the arguments of the evaluate function. The return type of compile() is a Boolean, true for a good compile, false for a bad one.
The evaluate() function takes from 0 to 6 arguments. These are the input double values for the variables defined with compile{}. With no argument the function has no variables, as say 2*exp(3.5). The return type of evaluate() is a double which results from evaluating the function.

FormReturn 0.8.1b
FormReturn is OMR software (Optical Mark Recognition software) for Windows, Mac OSX and Linux more>>
All you need is the FormReturn Application (download here), a printer and a document scanner and you will be able to process hundreds of forms within minutes! Think of the time and money you will save.
Major Features:
- It is the only decent software based OMR solution made for Mac OSX. It is also designed for Windows and Linux. You can share FormReturn files between all platforms.
- It is a fully integrated OMR form editor, database and OMR form processing solution. Most other OMR software solutions require a seperate word processor and database. They also require the installation of OMR and barcode fonts. FormReturn is much more advanced as it creates its own vector based barcodes and OMR mark areas.
- When editing an OMR form in form editor, when you create checkboxes (bubbles), you supply both the values, fieldnames and marks allocated when creating it on the page. Other OMR software systems require you to design the checkboxes in a word processor with special OMR fonts, print the forms out, scan the forms in, select the checkboxes in the scanned image and add the values. All the extra steps can be very tedious and time consuming with other OMR software solutions. If you update an existing form in FormReturn, you don't have to go through the whole process of re-training forms. There is no need to "train" forms in FormReturn.
- If you want to personalize forms with custom names taken from records in a database (such as firstname and lastname), you don't need to do a mail merge. FormReturn can do this very easily using its special system called Template Variable Replacement (TVR). Furthermore, you can use database data to create custom barcodes of all different types, sizes and placements on each form.
- FormReturn uses automatic form ID generation (placed as form ID barcodes) to track and automatically process form pages. You can have more than one page per form. Other OMR software solutions only allow one page for auto ID generation as they never factored in needing more than one page for a form.
- What are some of the technical features of FormReturn?
- Java Swing Application - Runs on Windows, Mac and Linux.
- Barcode creator - Support for 1D barcodes (Code128, EAN13).
- Barcode reader - Support for 1D barcodes (Code128).
- SVG (Scalable Vector Graphic) support - Can embed vector graphics for high quality printing.
- Raster image support - Can embed PNG, JPG, GIF files.
- Truetype font support - Supports truetype fonts.
- PDF export - Exports forms and previews as PDF files.
- Embedded, networkable database - JDBC compliant embedded database.
- Image deskew - Form images can be deskewed automatically.
- Form template editor - An integrated template editor that allows you to publish personalised forms.
- Sub-forms (segments) - When publishing, multiple sub-forms can be included depending on the data provided.
- Template variable replacement - Templates that contain variables such as eg. become John Smith, Joe Smith, Jane Doe etc when they are placed in a form and then published.
- What makes FormReturn different from traditional (hardware based) OMR systems? No need for expensive hardware or pre-printed answer sheets - You can use an ordinary scanner to scan answer sheets and an ordinary printer to print answer sheets.
- Customised answer sheets - You can completely customise and personalise answer sheets. You can also have more than one page.
- What makes FormReturn different from other (software based) OMR applications?
- While FormReturn can work the same way other OMR programs do with two separate pages (a question sheet and a mark sheet), one of its greatest advantages is that you can combine both using only the one form.
- One Form for Marks and Questions - FormReturn forms can combine both the questions and mark area together. The design of the forms is entirely up to you.
- Automation - Shares processed data with other third party applications the instant a form is processed (via its database).
- Form ID generation & record reconciliation - Automatically link source records to completed answer sheet mark data.
- No third party applications required - The template editor creates answer sheets and the built in database stores results.
- No need for mail merging - FormReturn has its own built-in relational database and template editor to create customised/personalised answer sheets.
- Mac OS X support - Unlike most other OMR programs, FormReturn is one of the very limited number of OMR applications available for Mac OS X. This is particularly important for the education industry.
- Cross platform - Works on all major operating systems (Windows, Mac, Linux).
- Image Deskew - If Completed marksheets are not fed into scanners "straight", the automatic deskew function will turn the image to the correct angle.
- Image Compression Compensation - If the image scanning mechanism compresses the image horizontally or vertically, it should not affect the detection of the mark area.
- Simplicity - A single application to create custom answer sheets, automatically linking source records to answer sheet mark data.
Enhancements:
- New Features:
-
- When making a scribble mark inside of an OMR box, it no longer needs to touch the edges of the omr box. Eg. a dot in the center of an OMR box will count towards it as being recognized as a mark. This improves the detection of marks in many ways. The improved mark detection algorithm in 0.8.0b has made this change possible.
- In the source data record import area, you can now select the import CSV format as either tab or comma separators, and quotes, double quotes or no quotes.
- The application has new icons and a new logo!
- Now detects forms that are scanned upside down. If a form is scanned upside down, FormReturn will automatically rotate the form 180 degrees if it cannot find any Form ID barcodes where it will then check again.
- More screenshots appearing in the help guide.
- Beta trial period extended to 31 August, 2009.
- Bug Fixes:
-
- Software update had a bug in it, couldn't figure out the versions correctly. Now fixed.
- Major bug fix - When publishing a form with more than 1 page in versions prior to 0.8.1b, the mark area detection boxes would overlap between pages. Found bug and fixed it. However, you need to re-publish forms in order for these changes to take effect.
- The processing queue's unprocessed images preview now works properly. Impliments the new image preview with zoom functionality.
Requirements:
- Mac OS X 10.5 or above.
- Mac computer with an Intel,
- PowerPC G5, or G4 processor.
- 512 MB RAM.
- 10 GB free storage space.
Wave Simulation 1.0
Wave Simulation is developed as a smart program which is simulative to a wave disturbance propagating on a two dimensional membrane. more>>
Wave Simulation 1.0 is developed as a smart program which is simulative to a wave disturbance propagating on a two dimensional membrane. The program uses a timer to step the simulation. At each step a two dimensional wave equation is solved by using a finite differencing scheme that is space centered and time forward. The initial conditions have been exaggerated for better visibility in the OpenGL output. See the commentary in the source code for further details. The idea here is to demonstrate simple numerical processing and scientific visualization in a Cocoa based application.
The program structure uses the Model/View/Controller paradigm. The classes for this structure are grouped under one heading and the various support classes are grouped under another heading. The View part of the program combines the user interface (UI) and the OpenGL rendering. The GLView class is a wrapper, i.e., sub-class, around the NSOpenGLView class that gives the class the ability to render, among other things, a mesh that is passed in from an outside source.
The view point and lighting that the GLView class uses in its rendering is also provided from outside. The visible part of the GLView in the UI is an outlet for the rendering. Also, the GLView object has been set up so that a mouse click in the visible rendering area toggle betwever, each update cycle is quick enough to justify a single threaded structure for the program.
An important characteristic of this program is that the OpenGL rendering is encapsulated in two parts of the program: the GLView class and the DrawingFunctions.h module. All of the other support classes make no reference to OpenGL. The Avian class is meant to capture the concept of an extended physical body that can have a location in 3D space as well as an orientation.
The FlyingCamera class is based on the Avian class and provides it with extras that are appropriate for handling views from various positions and orientations. The Mesh and MeshNode clases are also divorced from OpenGL. A GLView object 'knows' what to do with FlyingCamera and Mesh objects, but not vice versa. Also, the Controller object 'knows' how to relate user input, via the steppers, to FlyingCamera settings.
This program is also provides a good way to waste enormous quantities of time. The membrane uses a material that is meant to be a fair approximation of ruby. When the light is set to, say, colatitude equal to 35 degrees and longitude equal to 200 degrees the surface shows some nice highlights. Be warned: this program can induce a hypnotic state in the unwary user.
Matematica Matrices 1.1.1
Matematica Matrices - Matrix Algebra with AppleScript more>>
It has handlers that add, subtract, multiply, find the inverse, compute the determinant, put a matrix in the upper or lower diagonal form and find its transpose.
It also allows one to solve a linear system of the form Ax=b, where A is a square, invertible matrix.
Enhancements:
- Ive changed commas to semicolons, since commas are decimal separators in the majority of the countries.
Print Form Letter EW (Entourage) 1.1.1
Print Form Letter EW (Entourage) - Print envelopes to contacts or groups more>>
Enhancements:
- Fixes a bug that didnt print a colon (rather than a comma) in the salutation when selected in the Preferences.
- Fixes a bug that progressively and mysteriously removed lines above the address in succeeding copies of the form letter for some users.
- Speeds up pre-printing processing.
DSVariables 2.0.1
DSVariables - Dynamically use live variables in FileMaker databases more>>
It has been tested in a real world accounting and inventory system and was used to collapse multiple scripts that called each other back and forth to complete a task between two databases into a single pair where one script set up all needed variables and the other script simply read the values and performed the required work.
The DSVariables plugin file must be dropped into your FileMaker Extensions folder, and FileMaker must be quit and restarted in order for the variable functions to become available. If you are running FileMaker Server, all the client machines must have the plugin in order for scripts using variables to function normally.

Calcolo ControCodice INAIL 1.0
Calcolo ControCodice INAIL is a simple application for verifying the code of control on the positions and the company codes of employers attributed by the Italian Welfare ( the code of two digits usually given in forms such as CC). more>> <<less
Fill Contact from Form (Entourage) 1.3
Fill Contact from Form (Entourage) - Automates contact data from a web CGI more>>
You can run it from a Mail Rule so that it deals with the messages automatically as they come in.
Enhancements:
- Various enhancements.