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: MongoDB is a popular open-source, document-oriented NoSQL database. It stores data in flexible, JSON-like documents, rather than rows and columns used in traditional RDBMS. MongoDB is scalable, high-performance and easy to use.
Type: software
Pricing: Free