Pencil is built for the purpose of providing a free and open-source GUI prototyping tool that people can easily install and use to create mockups in popular desktop platforms.
Sqitch is a database change management application.
Sqitch is not integrated with any framework, ORM, or platform. Rather, it is a standalone change management system with no opinions about your database engine, application framework, or your development environment.
Remove Image Backgrounds Beta
Instantly create masks, cutouts, and clipping paths online
YSlow for PhantomJS
Online diagram/mockups design.
A JavaScript Code Quality Tool. JSHint is a tool that helps to detect errors and potential problems in your JavaScript code.
Rich tools for instrumenting, analyzing, and visualizing web apps.
Check easily whether a gem is ready for Rails 4 or not.
A tool for easy online testing and sharing of database problems and their solutions.
A CLI tool for detecting frontend SPOF, mainly blocking scripts and CSS
Tabula helps you liberate data tables trapped inside PDFs
Convert MySQL Queries to MongoDB Syntax
A better way to conduct remote interviews
WebRTC based video chat + code editor = Awesome interviews
csscss will parse any CSS files you give it and let you know which rulesets have duplicated declarations.
manifestR is a bookmarklet, which you drag to your bookmarks bar. Then, when you visit any page, you can click the manifestR button, and it will create an HTML5 appcache manifest file for that page.
Set of tools for testing with older or newer IE browsers
A debugger for RESTful web services.
Codebender is an embedded development platform with an emphasis on the Arduino and it’s completely web-based, so you don’t have to install, manage and update anything.
MySQLTuner is a script written in Perl that will assist you with your MySQL configuration and make recommendations for increased performance and stability.
dbv.php is a database version control web application featuring schema management, revision scripts, and more!