Zato is an Enterprise Service Bus (ESB) and app server written by pragmatists for pragmatists. It provides an HA load-balancer, hot-deployment, and hot-reconfiguration almost everywhere (forget server restarts). It has a browser-based GUI, CLI, and API (forget XML configuration). It supports many protocols, industry standards, and data formats, including HTTP, JSON, SOAP, REST, AMQP, JMS WebSphere MQ, ZeroMQ, Redis, SQL, and FTP.
wger Workout Manager is a Web application that can manage your workouts, group them into schedules (A>B>C), and export them as PDFs or iCal files. It helps you keep a log of the weights lifted in the different exercises as well as your own body weight and can also create and manage your diet plans.
Jquery Slider Shock is a powerful slider extension which works with any website powered by WordPress or jQuery. It allows you to quickly and easily enrich your site's content by adding text, images, audio, or video from both local sources and external ones such as Flickr or YouTube.
Spaghetti Parenthesis Visualizer is an in-browser (meaning that it doesn't send your code to a server) tool that takes deeply nested conditionals in languages that follow in C's footsteps, including Python, Perl, PHP, and Java, SQL queries, or some Lisp code, and provides two visual presentations that clearly and cleanly display how deep each part of the code is in the layers of nesting.