One of my favorite topics at Dreamforce is always the Top 10 Free Apps. I use as many free apps as paid ones, and I have found that just like with software, there are very useful and well-constructed free AppExchange apps. So without further ado, here are the Top 10 Free Apps (by number of downloads) for 2011:

Field Trip

DupeCatcher

Jitterbit Data Loader

Timba Surveys

Grid Buddy Free

Salesforce Adoption Dashboards

Graphics Pack

Mass Update and Mass Edit from List View

Cloud Swarm 3

Action Plans