ScannerDaemon is the virus scanner of the OpenAntivirus project. You can send a filename to it via simple TCP and it will scan the file for viruses and tell you if the file is infected or not. The ScannerDaemon comes with its own virus database, so you do not need any commercial virus scanner. There is a plugin for AMaViS and several mailservers to scan all EMail going through a mail server.
