NET Reactor is a powerful .
License: Shareware
OS Support: Linux, Linux Console, Linux Open Source, Mac OS X, Mac Other, WinXP, Win2000, Win Vista, Win98, Linux Gnome, Unix, OS/2, Windows 7

Multi-threaded C# and VBNET scripting runtime environment for building applications with the ease of running a script from the command line.
License: Demo
OS Support: WinXP, Win2003, Win Vista, Windows 7

Fully scriptable free AppleScript based working environment.
License: Freeware
OS Support: Mac OS X,Mac OS X 10.5,

Komodo Edit: Free multi-platform, multi-language editor: Perl, Python, Tcl.
License: Freeware
OS Support: Mac OS X,

Komodo IDE from ActiveState for Perl, Python, Tcl, PHP, Ruby, Javascript.
License: Commercial
OS Support: Mac OS X,

ECMerge diffs/merges local/FTP/SCC files/folders 2-way with syntax colouring.
License: Demo
OS Support: Mac OS X,

ECMerge diffs/merges local/FTP/SCC files/folders 3-way with syntax colouring.
License: Demo
OS Support: Mac OS X,

Serna Enterprise: cross-platform WYSIWYG XML editor, supports DITA, Docbook, etc.
License: Shareware
OS Support: Mac OS X,Mac OS X 10.4,Mac OS X 10.5,

SQL Code Library is a powerful source code Library shipped with 50,000+ lines of code, quick and powerful search engine, powerful printing capability, password protection, user notes & attachments handeling, favorites & rating support and mor.
License: Shareware
OS Support: WinXP, Win2003, Win Vista, Windows 7

Generates MS SQL Server database scripts to recreate the data, tables, stored procedures, views, triggers, keys, indexes and more.
License: Freeware
OS Support: WinXP, Win Vista