Released and supported by Instagram, this library allows Python applications to interface with the Instagram REST and search APIs. One can follow updates to this library on the Instagram Developer's Blog or the Stack Overflow community hub.
Recently, blogging service Posterous thought it would try and help ease the burden of moving from other places on the web to its blogging platform by developing a bunch of migration tools. All of these tools were built on other services' open APIs and designed to go in, grab your content, and republish it through Posterous maintaining as much metadata as possible. Things were fine until photo-hosting service Twitpic caught wind and cut of Posterous' API access.
Taking notes, sharing thoughts with a team or others who may be interested, bouncing ideas around or working on quickly getting a job done; all these things are so easily accomplished with the help of a live group word processing tool. HackPad offers just this. It's a lightweight collaborative tool that allows users to invite other users and edit documents in real time. What's even better is that the availability of the HackPad API means that it's possible to integrate this functionality into other sites.