Glimmer - An all-purpose editor. Features include find/replace, goto line, syntax highlighting, undo/redo, tear away windows, as well as many other standard editor features..
Lyx - The Document Processor - A free program that provides a more modern approach of writing documents with a computer..
nano - improved pico editor - nano is a good editor and a replacement from GNU for the pico editor from washington.edu used with pine. Has both search and replace and mouse support..
NEdit - GUI style plain text editor for X Windows Motif systems, including on MacOS X, OS/2, MS Windows. [Open Source, GPL].
QuickHelp - Linux Help Authoring - QuickHelp is a development tool for quickly creating and distributing online help for Linux applications. QuickHelp consists of a QuickHelp Builder for creating help systems and a QuickHelp Viewer for deploying them to end-users..
Siag Office - A free office package including word processor, spreadsheet, and graphics animator..