CodePlex is probably the best source of free and open source Microsoft projects.
Amongst other uses, it is used extensively by the Microsoft Communities to share free tools and add ons to existing CRM technologies (MSCRM; SharePoint; etc.)
Currently hosts around ~794 on CRM.
So… a lot…to trim it down a little bit, below is a top 10 of what I consider currently to be the best, most helpful, tools in CodePlex for MSCRM. These are tools I use consistently in a daily basis and that in generally an IT professional working in the Microsoft CRM arena, would, or should, know.
And you? What is your top 10? Got any favorites? Share your thoughts in the comments below. Chers.