nanoScroller.js - jQuery plugin to implement OSX Lion-styled scrollbars for your website.

strong_parameters gem allows you to “test drive” the new way that Rails 4 is going to treat parameters security. attr_accessible and friends are being deprecated.

celluloid.io interesting approach to multithreaded programming for Ruby.

Letters - new take on debugging logging library for Ruby.

showcase of 40 pricing tables and signup pages can help with with some inspiration for your pricing page.

lenticular.js - Tilt controlled images.

Repo.js - light-weight jQuery Plugin that lets you easily embed a Github repo onto your site.

FullCalendar is a jQuery plugin that provides a full-sized, drag & drop calendar with events etc.

tl;dr Legal - easy summaries of open source licenses.

CCMenu - OS X menu bar application to pull build status of your projects. Support many different CI backends.