TraceKit : Not all browsers support stack traces on error objects, but TraceKit squeezes out as much useful information as possible and normalizes it.
Firebug Lite : A JavaScript file you can insert into your pages to simulate the Firebug console in browsers that are not named Firefox.
Cypress : JavaScript End to End Testing Framework. Fast, easy and reliable testing for anything that runs in a browser.
Greasemonkey : Greasemonkey is a Firefox extension that allows you to customize the way webpages look and function.
DOM Monster Bookmarklet : DOM Monster is a cross-platform, cross-browser bookmarklet that will analyze the DOM & other features of the page you're on, and give you its bill of ...
XP-Dev.com : Free Subversion Hosting, Version Control, Project Tracking
Google App Engine : Google App Engine lets you run web applications on Google's infrastructure. App Engine applications are easy to build, easy to maintain, and easy to s...
SDF Public Access UNIX System : The Super Dimension Fortress is a networked community of free software authors, teachers, librarians, students, researchers, hobbyists, computer enthu...
Data Science Toolkit : A collection of the best open data sets and open-source tools for data science, wrapped in an easy-to-use REST/JSON API with command line, Python and ...
MediaGoblin : MediaGoblin is a free software media publishing platform that anyone can run. You can think of it as a decentralized alternative to Flickr, YouTube, S...
DERI Pipes : Inspired by Yahoo's Pipes, DERI Pipes is an engine and graphical environment for general Web Data transformations and Mashup.
Anything to Triples : Anything To Triples (any23) is a library, a web service and a command line tool that extracts structured data in RDF format from a variety of Web docu...
Linked Data : This site exists to provide a home for, or pointers to, resources from across the Linked Data community.
Freebase : A community-curated database of well-known people, places, and things
Hoppscotch : A free, online, open source API request builder
Calais is a rapidly growing toolkit of capabilities that allow you to readily incorporate state-of-the-art semantic functionality within your blog, content management system, website or application.