Collaborators on a version-controlled .tex file can track changes.
LaTeX Track Changes shows changes over time for a .tex file that has its history stored in a git or svn repository. The user can customize how to view the changes: limited to certain authors or by revision or date among other filters. An Emacs mode provides the user interface. Plug-ins for other editors (such as TeXShop) are planned.
StorySurfer is an application to write short stories, novels, scripts, other documents; handle creating/modifying project/story info, characters + their relationships, locations, items, timelines, submission tracking, ToDo list, & research notation.
HTMLtools includes several Java HTML tools for preparing Web pages. The HTMLtools program automates batch conversion of tab-delimited spreadsheet text files to HTML Web-page files, file & table editing, keyword mapping, templates, and more.
AuthorWeb is an organization platform for writers of all kind which includes tools for creating and organizing Characters, Sets, Plots, Scenes, and other information for the craft. Written in Java, the executable jar can be run on any OS platform.