UltraSurf (AKA: 無界瀏覽) is one of the world's most popular free anti-censorship and pro-privacy applications, developed by UltraReach Internet Corporation in 2002. It was originally created to help internet users in Mainland China (where the Internet is heavily censored and Internet users' activities are monitored by the Great Firewall of China) bypass internet censorship and protect their online security & anonymity. After that, it became popular in many countries with Internet blockade due to its good usability, fast running speed and unlimited network traffic.

Hotspot Shield (short for HSS) is a powerful, acclaimed free VPN (Virtual Private Network) agents automatic searching tool. It's mainly designed to effectively protect personal web surfing security and privacy; as well as breaking through the local network limits to access those blocked, censorship websites (like YouTube, Facebook, Twitter, or even Gmail) in some countries.