Developed by Office Efficiencies, India, SafeSquid lets users block certain file types, such as audio, video, and Flash. It can block inappropriate content, such as pornographic sites or sites dedicated to hate or drug promotion, and offers protection against malware -- spyware, viruses, worms, etc. It also allows for Web caching.
SafeSquid is used primarily by ISPs that provide value-added services along with Internet access, and by commercial institutions. The software is commercial but free for networks with three or fewer users.