Cross Platform editors
- NetBeans – http://netbeans.org using NetBeans Ruby Support
- Eclipse – with RubyDevelopmentTools, Tutorial 1 , Tutorial 2
- Komodo Edit – http://www.activestate.com/Products/komodo_ide/komodo_edit.mhtml – An open source code editor based on the commercial Komodo IDE. It has file tree view and auto completion, among other features.
- Aptana Studio? – http://www.aptana.com/studio Eclipse-based IDE with Rails support via the RadRails plug-in (tutorial above on Eclipse might be of help)
- Scite (linux/win32)
- jEdit – http://www.jedit.org/ + Ruby Editor Plugin – HowTO set it up, Abbreviations: TextMate-like functionality for jEdit
- Vim – http://www.vim.org/
- Cream for VIM: http://cream.sourceforge.net/
- Emacs + rails.el – http://www.emacswiki.org/
- FreeRIDE – http://rubyforge.org/projects/freeride/
- Pida – http://pida.berlios.de
- Macromedia Dreamweaver, Macs, Windows (Tutorial: http://www.bdcsoftware.com/dev_rubyonrails_dreamweaver_codehints.php)
- RadRails – http://www.radrails.org (now a plug-in for Aptana Studio)
- Arachno Ruby – http://www.ruby-ide.com (linux/win32). HowTo: Setup Arachno for Rails and Get Full Debug/Develop Capability—Win32
Linux
- Quanta + – http://kdewebdev.org/
- Screem – http://www.screem.org/
- Bluefish – http://bluefish.openoffice.nl/index.html
- KDevelop – http://www.kdevelop.org/
- Kate – http://kate.kde.org/ – Samuel Kvarnbrink has written An ERb syntax definition for KDevelop which also works great with Kate – see instructions for use here (link dead, please update if you find a new one)
- Gedit – http://www.gnome.org/projects/gedit/ Supports ruby syntax highlight and now, throght a plugin, it can do some autocompletition similar to Textmate, uau
Also here are some Gedit External Tasks, Gedit Textmate-like - NEdit – http://www.nedit.org/
Mac Only
- TextMate – http://macromates.com/
- SQL Edit – SQL Editor + ERD tool. Exports to Rails using the SQL Export. http://www.malcolmhardie.com/sqleditor/cocoa/
- BBEdit with Ruby syntax-coloring plugin (The syntax coloring plugin doesn’t properly color ERb)
- SubEthaEdit – http://www.codingmonkeys.de/subethaedit/
- Smultron – http://smultron.sourceforge.net/
- Coda – includes code editor, graphical CSS editor, built-in shell (local/remote), and ftp client (compares local & remote directories) – http://www.panic.com
- skEdit – an advanced editor with several high-end features (snippets, code navigation, subversion integration, and more) in an easy-to-use interface.
Windows
- E Text Editor – http://e-texteditor.com , a TextMate clone for Windows. (Support TextMate bundles on windows, free trial)
- Intype – http://intype.info/home/ (Free, textmate inspired editor in beta)
- Antares – http://www.les-kaye.com/ (Free IDE)
- CrimsonEdit – http://www.crimsoneditor.com/ (Free)
- EditPlus2 – http://www.editplus.com/
- UltraEdit – http://www.ultraedit.com/
- Zeus – http://www.zeusedit.com/
- Notepad2 – http://mel.melaxis.com/devblog/2005/09/03/improved-ruby-syntax-highlighting-for-notepad2/
- PSPad freeware editor – http://www.pspad.com/
- Programmer’s Notepad – http://www.pnotepad.org/ (Free, open source)
- RIDE-ME – http://www.projectrideme.com
- RoRED – http://www.plasmacode.com/ (a Ruby on Rails IDE, requires .Net 2.0)
- See also Cross Platform Tools, listed above.