"Circular implements Buffer's great original MVP: the ability to stock up tweets, choose a schedule, and have them shared automatically through the day."

Simple but mighty handy if you wanna schedule tweets:

• http://circular.io/
• https://github.com/julien-c/Circular/

"Circular is built as a Backbone.js application that communicates with a MongoDB datastore through a REST API written in PHP.

The server part, based on the Silex PHP micro-framework and the Mongovel wrapper to MongoDB, is intended to be the dumbest possible, i.e. we tried to put most "intelligence" in the Backbone app, not in the API. (For example, the API only takes UNIX timestamps and posts' content, while the Backbone app computes the scheduled timestamps).

A daemon based on PHP-Daemon then runs in the background and is responsible for sending your posts to Twitter when they're due."