Nobody has produced more CRM 2011 tools than fellow CRM MVP Tanguy Touzard. There are a number of CRM 4 tools Tanguy has created as well which you can find on his blog and codeplex.
You can find his blog here http://mscrmtools.blogspot.com
The list of CRM 2011 tools that can be found on codeplex so far include
Let’s thank Tanguy for his hard work and for sharing these great tools with the CRM community.
You can also find these tools along with more development resources for Dynamics CRM on the Microsoft Dynamics CRM TechNet Wiki here http://social.technet.microsoft.com/wiki/contents/articles/microsoft-dynamics-crm-2011-development-resources.aspx