Here is a very interesting site for developers of indie games : http://www.pixelprospector.com/ (http://www.pixelprospector.com/)
The most interesting part is the resources section : http://www.pixelprospector.com/indie-resources/ (http://www.pixelprospector.com/indie-resources/), with tons of resources for everything related to games development (tools, games design, graphics, music, etc..)