TextBelt is an API for mobile texting. It works with particular US-based providers. 

TextBelt can be used for simple texting apps; web applications from which texting mobile phones would be appropriate; or for doing testing on your own, without a cost.

The following U.S. operators are supported: Alltel, Ameritech, AT&T Wireless, Boost, CellularOne, Cingular, Sprint PCS, Telus Mobility, T-Mobile, Metro PCS, Nextel, O2, Orange, Qwest, Rogers Wireless, US Cellular, Verizon, Virgin Mobile.

It is used with a simple POST request.

Dummy is a toolkit designed to make the development, testing, and presentation of web prototypes less time consuming.

Basically, Dummy makes inserting placeholder text and images easy.

Both are added to your prototypes dynamically and in a responsive manner.

It’s written in PHP, but can work in .html, too, after a brief setup.

Flight is a PHP micro-framework which enables building RESTful PHP apps quickly.

Flight sports an impressive, economic syntax for setting up routes and writing expressions and classes.

With a nice documentation, straight-up features, and an intuitive syntax, Flight is a very viable choice for a RESTful

Detector is a PHP/JS library for web-based feature detection.

Detector is great for any web application that uses cutting-edge technology and wants to avoid any feature-related surprises its users can encounter.

The library uses the browser’s unique user-agent string; however, as some features like webgl are hardware-related, Detector’s results aren’t entirely trustworthy, but rather give a very good idea of what is supported in the browser.

Limonade is a PHP micro-framework for rapid web development and prototyping.

Limonade features a simple coding structure not unlike that of Sinatra or Camping.

The plugin provides routing, callbacks, views and templates — i.e., the framework is MVC-based and features REST capacity.

The source is impeccably documented, making for a powerful, easy-to-grasp yet hard to master framework.

Academic is a minimalist blog CMS that puts the focus on the content.

Academic’s sole focus is content, and that means that there are no comments, no tags, and no categories. 

The CMS sports Tumblr-like post types — standard, link, status, and image — yet holds features necessary for a content-driven blog:

• RSS Feed;
• Integrated contact form;
• Cache support;
• Google Analytics and Disqus-compatible (so there are some comments after all).