Free syntax checking software for mac

Taco HTML Edit is designed exclusively for Mac OS X and uses many of the core technologies built into Mac OS X including image transparency (in the image map wizard), toolbars, multithreading (for quick tag coloring), and much more.
Taco HTML Edit is a full-featured freeware HTML editor.
Main features:
- Live previewing of HTML and PHP documents
- Projects with multiple documents
- Customizable HTML and PHP tag coloring
- Code Clips to keep track of frequently used HTML code
- The ability to choose any browser for the preview browser
- Creating new documents with the code from an existing file
- Customizable toolbar with a show/hide option
- Find panel with multiple search options
- Wizards for inserting colors, font tags, image tags, image maps, links, lists, meta tags, and tables
- Image map wizard that is easy to use and powerful
- Advanced Tag Insert Panel with all HTML 4.01 tags and attributes.
- Supports opening and saving files in Unicode and UTF8 formats to handle non-English characters.
- Checks tag syntax and structure.
- Auto-indent.
- Spell-checking, with ability to ignore HTML tags.
- Display line numbers for documents.
Enhancements:
- Fixes a bug where a tilde (~) character would be inserted into filenames when saving to a network volume.

Serchilo is a nice widget that allows you to easily access Serchilo.net from your OS X Dashboard. Serchilo is a wiki-based command line for the web.

Main features:
- Use localized commands.
- Use user commands (free registration necessary).
- Preview command syntax with autocomple.

A SNES emulator based on the SNES9X C++ core, and John Stiles port of the same. It is largely the same as Stiles version, but boasts some new features worth checking out.

TexMakerX is a platform-independent LaTeX editor. TexMakerX provides interactive spell checking, code folding and extended text navigation, while it also includes the features of the LaTeX editor TexMaker, like wizards, code completion and syntax highlighting

Main features:
- WE - Integrated Writing Environment
- All LaTeX tools can be called from TexMakerX with just one key press and you can add your own command line options (e.g. for forward/inverse search)
- LaTex tags and 370 mathematical symbols you can easily select and add to your text
- Wizards generating necessary code (e.g. documents, tabular/array-environments and BibTex-types)
- LaTeX errors are displayed in a Log panel and highlight within the tex file
- Structure View which shows the logical hierarchy of a file
- HTML Converter which creates a html out of your LaTex-based PS-file
- Text analysis counting and showing often used words or phrases
- LaTeX documentation where you can lookup the tags you dont know
- Customizable menu shortcuts
- DDE-Support to interact with other programs on Windows
- And also customizable code snippets, tabbed MDI view, ...
- Powerful Text Editor based on QCodeEdit
- Interactive spell checker which marks errors while you type them
- Syntax highlighting drawing LaTex commands in different, customizable formats
- Code folding which allows you to hide certain blocks
- Auto completion completes tags you wrote and shows corresponding help entries
- Unicode support which can handle files in all encodings
- Incremental search like in FireFox on a search panel at the text bottom (where you can also find a replace panel)
- Text Navigation jumps to bookmarks, certain lines, last changes and LaTex errors/warnings
- Key Remapping of single keys for automatically text insertion (e.g of nice quotation marks)
- And also line numbers, dynamic word wrapping, parenthesis highlighting, undo/redo, line change state ...
- Platform independence allows you to use it on Windows, Linux, BSD and Mac
- Automatical detection of MikTeX, Ghostscript and Standardlatex
- USB-Mode stores its settings in a texmakerx.ini (only if you create one!), so you can use the same configuration on different computers
- Translated in English, German and French

Enhancements
- added Windows DDE support
- added free menu key board mapping (also shift+insert key bindings)
- added word completion
- added error highlighting
- improved text analysis (phrases), recent file menu
- fixed MAC support (compiling, line endings)
- fixed possible crash with multiple instances and spellchecking
- more bug fixes

StarSpiral is an OpenGL screensaver that renders as the name says, a star spiral.
Kinda simple, but it can bring a nice visual effect.
Enhancements:
- "main screen only" option (useful on dual monitor systems)
- Use of OpenGL Lists (drawing speedup)
- Internet-based version checking
- other minor changes.

Code Collector is the right tool if you have some code you are proud of and you want to keep it somewhere for reference/
Code Collector lets you store code snippets with ease.
Enhancements:
- Added improved syntax highlighting, language selection and groups.

Requirements:
MacOS X Server 10.1 or later.