ZDNet: "Project Open is an open source project portfolio management solution based out of Europe. The software has attracted a fair following there and is used by a number of professional services firms (e.g., Cambridge Technology Partners). The software is frequently used in an on-premise mode although hosted versions are available from the firm or selected partners. I only had time for a cursory examination but the functionality appears fairly robust for service groups of 20+ people. It’s a PSA/PPM option for those looking at open source solutions." (Brian Summer)
http://blogs.zdnet.com/sommer/?cat=82
Ohloh:"$11,307,985: This calculator estimates how much it would cost to hire a team to write this project from scratch."
http://www.ohloh.net/p/illasme