Working with Microsoft CRM 3 for some time and Titan during the early adopters program I found that the entity browsers supplied with CRM has to much limitations. It does not show picklist values for instance. That is why I created this tool in the first place. While working with CRM 4.0 I also found that the tools for plug-in development didn't work that well.
This tool incorporates an entity browser which allows you to browser all the entities, their attributes and available SDK messages. Second it has a Plug-in browser which allows you to browser, create, update and delete plug-ins registered on the connected system.
For the 2011 version click here