http://developer.wordpress.org/ Mullenweg announced the creation of a developer resource website. It’s not quite ready yet so if you go to the URL, it will redirect to the WordPress.org site.
Submit RSS Feeds – Top 15 Ranked RSS Feed Directories
Website performance testing sites
Open Street Map
The Free Wiki World Map for mapping to one location without ‘extra’ stuff from Google in the map. OpenStreetMap is a free worldwide map, created by people like you. The data is free to download and use under its open license. Create a user account to improve the map.
WordPress 3.6 “Oscar”
The latest and greatest WordPress, version 3.6, is now live to the world (as of August 1) and includes a beautiful new blog-centric theme, bullet-proof autosave and post locking, a revamped revision browser, native support for audio and video embeds, and improved integrations with Spotify, Rdio, and SoundCloud.
Visual Collaboration for Creative People
AND the other ‘one’ for visually putting things together is called Popplet, a place to share your ideas.