MailCatcher runs a super simple SMTP server which catches any message sent to it to display in a web interface. Run mailcatcher, set your favourite app to deliver to smtp://127.0.0.1:1025 instead of your default SMTP server, then check out http://127.0.0.1:1080 to see the mail.

Dugway allows you to run your Big Cartel theme on your computer, test it in any browser, write code in your favorite editor, and use fancy new tools like CoffeeScript, Sass, and LESS. It's awesome.

Spar uses Rack and Sprockets to provide an asset development environment very similar to the asset pipeline found in Rails. It also has built in deployment tasks for deploying your entire site to AWS S3 and Cloudfront.

Why another static site generator? Machined is for the developers who know and love the asset pipeline of Rails 3.1 and want to develop blazingly fast static websites. It's built from the ground up using Sprockets 2.0.

Async web framework

loaded dynamically over any web page, this will help you to overlay designer's work on your DOM rendering

Everything needed to setup a new app on Fanforce

Everything needed to setup a new plugin on Fanforce

A rack based static site builder with templates, layouts and project structure based routing.

A visualizer for transformations of code in Static Single Assignment form based on the Furnace library.

Mount any LocomotiveCMS site, from a template on the filesystem, a zip file or even an online engine

All the stuff that make front end web development fun, in one simple toolkit

A painfully opinionated Appetizer extension for web apps.

Arcabouco WebApp Framework

Bolt-on CMS for Padrino

A toolkit for bootstrapping and developing WordPress themes with Bones Theme as a starting point. Fones is a combination of Forge and Bones.

A toolkit for bootstrapping and developing WordPress themes.

Guard::Cogs packages your coffeescript, javascript, sass, and css.

Jet is a micro framework that sits on top of sproutcore 2

This gem helps you to serve proxy.pacs locallly