With everyone in the world building application stores on the iPhone AppStore model, it's refreshing to see such an effort applied to actually getting things done. I'm not saying the iPhone marketplace is frivolous, but it isn't completely focused on work. The Eclipse Marketplace is, itself, the solution to a big problem. It's long been a pain to find and install all the various bits and baubles you need to customize Eclipse for your corporate environment.
So the Eclipse Marketplace makes it easier to find all those things in one place. Certainly the core Eclipse tools are hosted at Eclipse.org, but as we all know, every software company in the world seems to have some sort of Eclipse plug-in these days. And the Eclipse Marketplace is the place to find them. Ian Skerrett wrote up a nice introduction to the Marketplace when it launched on Dec. 9.
There's already a vast selection of tools hosted there. Check out the screen mockup/UI design tool, Wireframe Sketcher. Or Pulse, the automated update and management tool for all your Eclipse stuff. And as long as there's an Eclipse, there will be a need to figure out what the heck it's doing: The Eclipse Log Analyzer is the most popular tool in the Marketplace right now.