Sprouter, Gist, Foursquare, GoWalla…& more for you:
collaboration, geo-location, networking, management. It’s all here. 
This is a great article with important information for social networking.
Credit: Aliza Sherman, writing @ WebworkerDaily
http://webworkerdaily.com/2010/06/16/24-iphone-apps-to-improve-your-social-networking/
See also: Lissette Flores site for Travel Apps (not free).http://tweettown.wordpress.com/2009/06/29/top-20-iphone-travel-apps/
