Walkway.js is an easy way to animate your simple SVG elements. It includes built-in easing functions, and also has options for selector and duration.
Motherplate is a bare bones HTML5, CSS3, and SCSS responsive boilerplate. It doesn't include any visual styling or components, just bare bones CSS to get started with.
Backgrounds can give your project a completed look. They just add that extra something that helps your design go from good to great! With this Mighty Deal from ...
Glumpy is a python library for fast, scalable scientific visualizations. It serves as an interface between OpenGL and numpy.
CSSplot lets you plot points on a chart purely with CSS. It works for bar charts, vertical bar charts, and scatter plots.
FlowupLabels.js augments your form labels so they behave like placeholders, shrinking and moving out of the way on active fields. It uses semantic labels, rather than actual placeholders.
ZorroSVG makes it easy to add masks to your SVG images. It makes it possible to create images with PNG-like transparency while maintaining small file sizes.
Fabric, from Twitter, is an easy way to build mobile apps. It's cross-platform compatible and modular, with SDKs organized into "kits" to make dev easier.