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: Wolfram Alpha is a computational knowledge engine that allows users to get instant expert-level answers to questions on math, science, and many other topics by typing queries in plain language. It understands and computes answers across many domains.
Type: software