Description: LibraryThing is an online service that allows users to catalog their books easily. Users can keep track of books they own, books they have read, books they want to read, and more. The service provides recommendation features and social networking elements for readers.
Type: software
Pricing: Subscription
Description: Stack Overflow is a popular question and answer site for programmers. Users can ask coding questions and receive answers from a community of developers. The site has a reputation system to rate helpful responses.
Type: software
Pricing: Subscription