The GameJolt Lua SDK by Max interacts with the API to access game functionalities. Current Lua projects include One Bit Arena http://gamejolt.com/games/one-bit-arena/41484 and Random Rooms http://gamejolt.com/games/random-rooms/85035
Publr.com is a free blogging service with a few innovative features. It allows posts of various types, including your typical text, but also including maps, videos, chat transcripts, and links. Its site has a pretty good typical web interface for such things, and there are both first-party and third-party applications to use to post. Those third-party applications use the Publr API.
The latest beta release of Chrome includes support for W3C's Credential Management API. The API allows developers to store and sync sign-in information with a browser's credential manager. Chrome support and integration should cut down on the number of sign-ins required by a user while browsing.