ADL Hate Filter: Blocks access to sites that in the judgement of the Anti-Defamation League advocate hatred, bigotry, or violence against groups based on their religion, race, ethnicity, sexual orientation or other immutable characteristics.
American Family Filter: Server-based Christian Internet filter with no password override for homes, schools and businesses. Blocks material in ten categories.
Blocking Software FAQ: Answers to questions about what sites censorware blocks.
Cloudmark SafetyBar: A toolbar for Internet Explorer which blocks sites containing spyware, viruses and worms, and helps protect against identity theft and phishing. For Windows computers.
Cyberpatrol: Internet filtering, blocking and monitoring software for Windows. Blocking list updates require subscription.
Cybersitter: Windows (32-bit) filtering program for web, news, mail, and ICQ which supports PICS and can keep history of all Internet activity. Free block list updates. 30-day free trial.
DansGuardian: Offers phrase matching, url filtering and PICS filtering. News, FAQ, mailing list, screenshots. [Unix, Linux, BSD]
iPrism: Internet server appliance hardware which does URL-based filtering and monitoring. Site categories include Alcohol/Tobacco, Finance, Weapons, and Web Banners.
Kid's Internet World Explorer: A web browser that provides access to internet material based on a whitelist of approved websites appropriate for children.
MicroWorld Software Services Pvt. Ltd.: eScan offers anti-virus, anti-spam, web content filtering and privacy protection features. [Windows]
N2H2, Inc: Offers category based url filtering and download blocking by file type. Web access can be segregated by user, machine and/or schedule. [Windows, Red Hat Linux]
Net Nanny: Content filtering, blocking, and monitoring software for children and organizations. Free block list updates.
Surf on the Safeside: UK-based service utilizing N2H2 proxy servers to filter home internet access.
Surfcontrol: URL- and keyword-based Internet filtering and blocking proxy. 20 blocking categories.
We-Blocker: Monitoring and URL-based blocking proxy for Windows. Provides blocking of a number of categories of sites.