Roost - Nice tool for businesses wanting to easily create social media campaigns across Facebook and Twitter. Includes suggested content, braining with Facebook toolbar and ability to create circles to amplify each other's content.
Topo.ly - Free tool that allows you quickly make custom Google Maps using your spreadsheet data - great way to plot out a map of customers and prospects.
CatchFree - This site is billed as a community that finds and compares apps in a variety of categories that are all free. I found some great new ones here.
