JGE Automatic Content Generator is a PHP script that will automatically add relevant content to existing web pages. Uses Calais to perform semantic analysis of an existing page's content to find essential keywords and then pull content relevant to these keywords from Freebase.
Gowalla, the location aware social networking service, has announced the release of their first public API (our Gowalla API profile). This will help them keep up with other location-centric social services like Foursquare's new API.
Facebook-owned Instagram has broken apps and surprised developers by substantially reducing the number of API calls allowed per user per hour. According to reports, the rate limit for the Instagram API was reduced from 5,000 per user per hour to 200 per user per hour this weekend without warning.