Editors for software development

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• Vim editor   
  Vim is a highly configurable text editor built to enable efficient text editing. It is an improved version of the vi editor distributed with most UNIX systems. Vim is charityware. Its license is GPL-compatible, so it's distributed freely.
  
  http://www.vim.org/

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• gtkdiff - Graphical diff tool   
  A diff front end program using gtk+, primarily used as a front end to the 'diff' command to compare files. It has diff3 and merge features.
  
  http://home.catv.ne.jp/pp/ginoue/software/gtkdiff/index-e.html

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• XEmacs   
  XEmacs is a highly customizable open source text editor and application development system. It is protected under GNU Emacs.
  
  http://www.xemacs.org/

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• Nvu - Web Authoring   
  A complete Web Authoring System for Linux Desktop users as well as Microsoft Windows and Macintosh users to rival programs like FrontPage and Dreamweaver. Open Source.
  
  http://www.nvu.com/

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• Bluefish   
  Bluefish is a powerful editor for experienced web designers and programmers. Bluefish runs on most POSIX compatible operating systems including Linux, FreeBSD, MacOS-X, OpenBSD, Solaris and Tru64. GPL licence.
  
  http://bluefish.openoffice.nl/

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