Ghost is a free, open source publishing platform. Also available as a hosted service for a monthly subscription cost.
Github provides free public code repositories, collaborator management, issue tracking, wikis, downloads, code review, and graphs. Private repositories are also available for a monthly fee.
Global Translator automatically translates WordPress sites into a variety of user-chosen languages, using one of four translation engines (Google Translation Engine, Babel Fish, Promt, FreeTranslations).
Google Scholar Citations lets you track citations to your publications, check who is citing your publications, graph your citations over time, compute citation metrics, and view publications by colleagues.
ICE is a content management system that can convert content authored in Microsoft Word or OpenOffice.org Writer into self-contained course websites using the IMS format.
iShowU is publishing and recording software for Mac. It enables you to record audio and video on your screen, capture full screen shots, and program recording settings.
Web-based service to keep track of the status of your writing submissions
Jing allows you to take screenshots, record screencasts, and instantly share information. Jing is the low end of a suite of screen capture products. SnagIt provides a few extra features (such as saving videos in formats other than SWF) for a small fee. Camtasia is at the high end, with full video editing capabilities.
Joomla is an open source content management system (CMS), enabling users to build websites and applications.
The LC Newspaper Viewer is an open-source web application that understands how to model newspaper data created according to a set of technical guidelines, with the goal of publishing an online archive like Chronicling America.
A simple and easy tool for creating EPUB, MOBI, and other ebook formats.
LiveJournal is a community publishing platform, with features characteristic of both blogging and social networking platforms. The site is longstanding, originally established in 1999 as a blogging platform and online community built around personal journals. Today comprises more than 50 million journals, with topical focuses such as politics, entertainment, fashion, literature, and design.
Markdown is a text-to-HTML conversion tool for web writers. Markdown allows you to write using an easy-to-read, easy-to-write plain text format, then convert it to structurally valid XHTML (or HTML).
Open Attribute is a suite of tools that makes it simple for anyone to copy and paste the correct attribution for any CC licensed work. These tools will query the metadata around a CC-licensed object and produce a properly formatted attribution that users can copy and paste wherever they need to.
Open Conference Systems (OCS) is a tool that allows users to create a conference website, send a call for papers, accept paper and abstract submissions, post conference proceedings and data sets, register participants, and enable post-conference online discussion.
Open Journal Systems (OJS) is a journal management and publishing system.
OpenETD is an open source, web-based software application for managing the submission, approval, and distribution of electronic theses and dissertations (ETDs).
Open peer review tool for items in Mendeley. Offers a method to monitor all feedback on scientific work for authors and allows others to review work. A watchlist feed keeps track of mentions and reviews of papers you're interested in.
Participad is a WordPress plugin that allows multiple people to edit the same WP content at the same time. Powered by Etherpad Lite, Participad gives you: notepads, for collaborative notetaking; ynchronous authoring of any content in the WordPress Dashboard; front-end editing.
NOTE: this platform is closing down on April 30, 2013 and will no longer be available.
Posterous Spaces is an online sharing platform where users can publish content via a web interface, by email, or by using a mobile app.