compare content filtering softwares

Cyclope-Series
Cyclope Internet Filtering Proxy monitors the entire Internet audio and video) rules. Cyclope Internet Filtering Proxy is an Internet Filtering Software designed to optimize Internet secuirty

J.A. Korsmeyer, Inc
Extensible Messaging Platform a SPAM filtering firewall server application. Protects -launch viruses) and other objectionable content. Filters mail using complex contextual ... POP3 retrieval, comprehensive user-definable contextual filtering, content-based message routing and developer.

VTTECHS, Inc
SurfKeeper is Internet Filtering and Parental is also able to perform content filtering. In addition, it provides internet surfing activities and instant messaging.

I would use the cyclope series as there are effective. as is it filters all the content you are wanting filtered.