Description: Blather is an open-source microblogging software that allows users to post short updates similar to Twitter. It is developed in Ruby and designed to be simple, flexible and easy to setup.
Type: software
Pricing: Open Source
Description: Brilliant.org is an online platform that offers math and science problems and courses to help people improve their logical reasoning and problem-solving abilities. It uses interactive quizzes and puzzles to make STEM subjects more engaging.
Type: software