Todo, GTD tools

You can keep notebooks stored in plain-text and have them synchronized with a directory on your mobile device, SD card, Dropbox, or over WebDAV.

Taskwarrior is an ambitious project bringing sophisticated capabilities to a simple and elegant productivity tool. You'll find it has customizable reports, charts, GTD features, Lua extensions, device synching and more, all while our international team provides excellent...

Vimwiki is a personal wiki for Vim -- a number of linked text files that have their own syntax highlighting.

Org mode is for keeping notes, maintaining TODO lists, planning projects, and authoring documents with a fast and effective plain-text system.