P3Scan is a fully transparent scanning proxy-server for email clients. It provides scanning of incoming/outgoing email messages for Virus''s, Worms, Trojans, Spam, and harmfull attachments. It can also parse messages for web-bugs.
Ircproxy is transparent IRC content-filtering application. It may be used whenever there is a need of monitoring IRC connections.It may be used to deny specific connections or to behold suspicious IRC traffic.
Crowd Control is an small, cross-platform HTTP proxy (a fork of the elhttp project) designed for systems with little RAM, such as a home router. It can filter URLs using SquidGuard blocklists, and has the unique ability to filter HTTPS domains as well.
sprintproxy is a quite small multithreading http-proxy in ANSI-C for use under a Unix/Linux - plattform. It has an applicable URL-filter and console-output for statistics.
pop3filter is a transparent pop3 proxy that enable apply `on the fly' filters to
the messages that are retrieved. Enable virus detections, mail backup, spam dete
ction, mime sanitize.
Security proxy to clean up all unallowed constructions from HTTP requests, detect intruders and filter outgoing HTTP traffic against leaking classified data.
Surfboard is a filtering HTTP 1.1 proxy. It features dynamic filter management through an interactive HTML console, IP tunneling, WindowMaker applets, and a suite of filters.
WaterFall project was started as a proxy/filter/firewall solution for NNTP (Usenet News) abuse protection. Due to the similiarity, SMTP may be covered as time permits.