API List - A collective list of APIs. Build something.
Wicked PDF - PDF generator (from HTML) plugin for Ruby on Rails
Airbnb Official API - Develop your application for millions of travelers & hosts
SEOBOTS.io - Easy to use bots for data mining and growth hacking: parsers, crawlers and much more.
PublicAPIs - Explore the largest API directory in the galaxy
TexAu - Growth automation to scale your business faster