The Tumblr Python SDK by Tumblr allows to make API calls through interactive console .py or Tumblr API console. Supported methods include user, blog, post, and tag. Guide to use the interactive console available. Authored by John Bunting on GitHub.
Transloadit offers media upload, modification, and storage as a service for developers who need that functionality (or, as Transloadit's homepage puts it, "geeks who run web or mobile applications") but don't want to worry about it themselves. There aren't too many moving parts to it, but they're ones a lot of applications make use of. The Transloadit API's main functions include: file upload, image resizing, video file encoding, image thumbnail creations, and file storage on Amazon S3.
LinkedIn has just announced that updates have been made to the LinkedIn Developer Platform to make it even easier for the development community to "use LinkedIn as their main distribution platform for discussing and sharing professional content." One of the key ways sharing professional content will be expanded is via the upgraded Share Linkedin API.