QtitanDataGrid is by far the fastest grid component for Qt on the market. It's a unique data library (third-party Qt widget) for Nokia-Qt that provides the same level of development comfort and functionality as its Delphi and .NET counterparts. The library smoothly integrates into QtDesigner and allows you to use its advanced data management features right "out of the box". QtitanDataGrid takes the functionality of QTableView to a new level by offering an array of unique features.

Ra-Ajax is a no-JavaScript Ajax library for ASP.NET.

Bitumen framework is a collection of lightweight libraries to develop web applications in Java / Clojure, and other JVM languages.

UFaceKit UI abstraction library which emphasizes on the MVP (ModelViewPresenter)-Pattern instead of the more common MVC (e.g. implemented by Swing). UFaceKit is build around the Eclipse Databinding Framework which is providing the foundation for the afore mentionned MVP-Pattern.

The Fluent.NET library introduces extension methods to make .NET code easier to read and more fluid to write.

Examples, tests and standard library for Groovy++. Groovy++ is statically typed extension of Groovy programming language.

Metric_fu is a set of rake tasks that make it easy to generate metrics reports. It uses Saikuro, Flog, Flay, Rcov, Reek, Roodi, Churn, Subversion, Git, and Rails built-in stats task to create a series of reports.

JointJS is a JavaScript library for creating diagrams. The diagrams can be fully interactive. Joint library is suitable for both implementing a diagramming tool as well as simply for publishing your diagrams.

ShareCoffee is a lightweight library for creating SharePoint Apps. It’s fully written in CoffeeScript by using Mocha, Chai and SinonJS.

Wu.js is a library for lazy, functional programming in Javascript. Works great in the browser, and also with CommonJS