Description: App.net was a microblogging and social networking service created in 2012 that focused on providing a simple, chronological feed. It charged a monthly subscription fee and positioned itself as an alternative to free services like Twitter by offering an ad-free experience focused more on the user experience than advertising revenue.
Type: software
Pricing: Open Source
Description: PostgreSQL is an open source, object-relational database management system known for its reliability, performance, and SQL compliance. It runs on all major operating systems and has a rich set of features including complex queries, foreign keys, triggers, views, and ACID compliance.
Type: software
Pricing: Free