'Extranet' planning/communication tools

I came aross BaseCamp today - it's an online planning / milestone / communication tool for projects across companies, teams etc. Very neat. However - are there alternatives in the open source world that can be run on own servers instead of having to subscribe to a managed service? MORE...

Improving CRM at Zingo Taxi

Not having had any particular problems grabbing a cab off the street recently, I hadn't had any incentive to give Zingo taxi a chance. Until last Thursday. Disappointingly, I met an immature CRM system... MORE...