j-chkmail

Homepage: http://j-chkmail.ensmp.fr/
Supports: libclamav, clamd
j-chkmail is a fast (written in C) filter for sendmail. It does spam and dangerous content (virus) filtering with help of ClamAV. The program supports many modes of monitoring and run time controlling and was designed to work on highly loaded servers. It's an open source software available for free to registered users (for non-commercial usage).