“Sidestep is an open-source application for Mac OS X that sits quietly in the background, protecting your security and privacy as you browse the web.”
#networking
MarcoPolo
“Context-aware computing for Mac OS X”
9 Ways to Build Your Own Social Networking Site
9 Ways to Build Your Own Social Networking Site
Free and open options for setting up at least the framework of a community site.
Freedom
“Freedom is an application that disables networking on an Apple computer for up to eight hours at a time. Freedom will free you from the distractions of the internet, allowing you time to code, write, or create. At the end of your selected offline period, Freedom re-enables your network, restoring everything as normal.”
CloudContacts
“The CloudContacts service takes your business cards and puts them to use! After we receive the cards, we turn them into contacts you can import into your email application, you can view your contacts online and export the contacts in a variety of formats.”