Redsn0w 0.9.6b3 to jailbreak iOS 4.2.1 GM firmware is now available for download. Along with iOS 4.2.1 GM jailbreak, RedSn0w 0.9.6b3 also comes with the ability to install jailbreak apps (custom bundles) regardless of Cydia support. The release also includes OpenSSH, OpenSSL, and the basic apt installer programs.