OpenVISP is a big project for Virtual ISP admin / pannel tools. You can see some primilary info on the OpenVISP tools pages.
You will find there projects :

And lots of other stuff. These are my main projects, oriented in Mass Hosting stuff and my non profit organization :


PopDrop is a POP3 to SMTP redirector like Fetchmail is. It is written 100% in Pike and it is designed to run with thousands of accounts in a MySQL Database.
It is threaded and it is designed to be fast.
Download the lastest version (1.9).