Note-Taking
- Evernote: (Mac, Win)
- Gournal: (Linux)
- Mynotex: (Linux)
- Notelab: (Linux, Mac, Win)
- Tomboy: (Linux)
- TreeLine: Notes/Database (Linux, Win)
- Xournal: PDF Annotator (Linux, Mac, Win)
Office Productivity Suites
- Apache OpenOffice: (Linux, Mac, Win)
- Apache OpenOffice: Portable (Win)
- AbiWord: (Linux, Mac, Win)
- AbiWord: Portable (Win)
- Bean: MSW Clone (Mac)
- Calligra: (Linux, Mac, Win)
- CryptPad: (Linux, Mac, Win)
- Etherpad: (Linux, Mac, Win)
- Joeoffice: (Mac, Linux, Win)
- KOffice Suite (Linux, Mac)
- LibreOffice (Linux, Mac, Win)
- LibreOffice: Portable (Win)
- MSWord : Free (Dos)
- NeoOffice: (Mac)
- OnlyOffice (Linux, Mac, Win)
- Siag Office: (Linux, Mac)
- WordPerfect: (Linux )
- Combine PDF (Mac)
- doPDF: Create, Convert, doPDF (Win)
- Evince: PDF Viewer (Linux)
- Final Page: Post Production (Linux)
- Formulatepro: PDF Editor (Mac)
- GhostView: PDF View (Linux, Mac, Win)
- Ghostscript: PDF View (Linux, Mac, Win)
- gImageReader: Extract Text from PDF (Linux, Mac)
- GSView: PDF View (Linux, Mac, Win)
- ICEpdf: Java PDF (Linux, Mac, Win)
- Jarnal: Notetaker, PDF Annotator (Linux, Mac, Win)
- MacGSView: View (Linux, Mac, Win)
PDF (continued)
- Okular: Viewer (Linux)
- Pandoc: Converter (Linux, Mac, Win)
- PDF Arranger (Linux)
- PDF Readers & Creators (Linux, Mac, Win)
- PDFedit (Linux)
- PDF Editing Tools (Linux, Mac, Win)
- PDF Extension (Linux, Mac, Win)
- PDF Mix Tool (Linux)
- PDFRead (Linux, Mac, Win)
- PDFsam: Split & Merge (Linux, Win)
- PDF software (Linux, Mac, Win)
- PDFTK: Build, Join, Split, Rotate (Linux, Mac, Win)
- PDF-Xchange Viewer (Win)
- PoDoFo: Libraries (Linux, Mac, Win)
- QPDF: Transformations (Linux, Mac, Win)
- Sun PDF Import (Linux, Mac, Win)
- SWFTools: Text Tools (Linux, Win)
- Win2PDF: Creator (Win)
- Xpdf: Reader (Linux, Win)
Text Editors
- Atom: Hackable editor (Linux, Mac, Win)
- Celtx: Screenwriting (Linux, Mac, Win)
- BBedit (see TextWrangler): Mac
- Docutils: Text Processing (Linux)
- Dokuwiki: Wiki (Linux)
- Emacs & Aqua: (Linux, Mac, Win)
- Encryptpad: Secure Text (Linux, Mac, Win)
- Etherpad: Web Editor (Linux, Mac, Win)
- eany: Editor (Linux, Win)
- GEdit: Editor (Linux)
- Glipper: Clipboard (Linux)
- Gmate: Editor (Linux)
- Gtkedit: (Linux)
- Hexeditor: Linux, Mac, Win)
- JEdit: Editor (Linux, Mac, Win)
- Joe's: Editor (Linux)
- Kate: Editor (Linux)
- Leaf: Editor (Linux)
Text Editors (Continued)
- Leafpad: Editor (Linux)
- Medit: Editor (Linux, Win)
- Music: Notation (Linux, Mac, Win)
- Nano: Editor (Linux)
- Nedit: Editor (Linux)
- Notepad2:Text Editor (Win)
- Notepad Plus: Editor (Win)
- NoteTab: HML Editor (Win)
- PyRoom: Editor (Mac, Win)
- SciTE: Editor (Linux, Win)
- reStructuredtext: Markup Syntax (Linux)
- Scribes: Gnome Editor (Linux)
- Sed: Streams Editor (Linux)
- Tea-Editor: (Linux, Win)
- Ted: Editor (Linux)
- Text Editors: Various (Linux, Mac, Win)
- Textroom: Editor (Linux, Mac, Win)
- TextWrangler: (Mac)
- Tiddlywiki: Web Notebook (Linux, Mac, Win)
- TinyMCE: Editor (Linux, Mac, Win)
- Recode: Converter (Linux)
- Vim: Editor (Linux, Mac, Win)
- WordGrinder (Linux, Mac, Win)
- WordPress: Publishing (Linux, Win)
- Writetype: Writing Made Easy (Linux, Win)
- XML: Editor (Linux, Mac, Win)
- XPad: Editor (Mac)
- Zim : Editor (Linux, Win)
Type Setting
- AUCTeX: Typesetting (Linux, Mac, Win)
- Gummi: Typesetting (Linux, Mac, Win)
- Kile: Typesetting (Linux)
- LaTex: Typesetting (Linux, Win, Mac)
- Latex2RTF: Translator (Linux, Mac, Win)
- Lyx: Typesetting (Linux, Mac, Win)
- MiKTeX: Type Setting (Win)
- TeX: Typesetting (Linux, Win)
- TexMacs: Typesetting (Linux, Mac, Win)
- Texmaker: Typesetting (Linux, Mac, Win)