NEditSave
GUI style plain text editor for X Windows Motif systems, including on MacOS X, OS/2, MS Windows. [Open Source, GPL] http://www.nedit.org/
QuickHelp - Linux Help AuthoringSave
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. http://www.excelsoftware.com/quickhel...
VIMSave
Vi was one of the original editors, and while difficult to use, loads much faster than, for example, Emacs, and is good for making small changes to files. http://www.vim.org/