Open Source Telephony
glengyron writes "Every Phreakers dream of Open Telephony took another step forward today when a small Australian company released their OpenPBX product at CeBIT Australia. Suddenly a massive community of programmers will be able to easily write their own Telephony applications in Perl!"
Disclaimer: I work for a computer telephony company.
That said, their product is very very poor. Almost no documentation in code (which is a MUST when you go open source), very buggy, doesn't work with most middleware (like Genesys, CT-Connect, TSAPI, Symposium etc.).
Those who can, do. Those who can't, consult.