AMaViS (A Mail Virus Scanner) scans e-mail attachments for viruses using third-party virus scanners available for UNIX environments. It resides on a UNIX (Linux) machine and looks through the attached files arriving via e-mail, generates reports when a virus is found and sets the delivery on hold.
BlackMail is an Anti-Spam mailer proxy for use with popular MTA's like Sendmail, QMail, and SMail. It is highly configurable, very powerful, very fast, and runs on a large variety of platforms. It has undergone extensive testing, and this is the most stable release, now with Solaris support.
chpp is a general purpose preprocessor. It was designed originally for the purpose of preprocessing HTML code but can be used successfully in other fields of application as well. Highlights are, beside powerful language constructs, CGI-scripting support and an SQL database interface.
Deliver is a program for reliable and flexible local mail delivery. It's a perfect adjunct to your mail transport agent of choice (such as Sendmail or qmail). You can use it to kill spam, drop messages from specific senders, add a [LISTNAME] prefix to the subjects of messages that are delivered through mailing lists, and lots more.
DSML is the Directory Services Markup Language, an XML dialect for working with directory information. The DSML Tools provide for the querying of any LDAP directory (with search results output as DSML), the importing of DSML data into any LDAP directory, the directory-context validation of DSML (checking for illegal attributes in the entries, etc.), and the calculation of the differences (for a directory) between two DSML documents to provide an XML Diff algorithm for DSML data. This software makes all LDAP-supporting directories DSML-enabled. It can also check the integrity of DSML data, and show at a glance how two data sets, represented as DSML, differ.