Vivaldi beta is a free web browser from the original Opera Web Browser founders in 1994, allowing you to preview the upcoming version. Download the stable version here.
Opera One is a free web browser that originally started as a research project back in 1995 and today continues to be a fast, safe and secure web browser. Portable version available here. Video walkthrough available.
Maxthon Browser for Windows utilizes a unique, innovative dual-core design that uses both Webkit and Trident to provide an advanced browsing experience.
BriskBard is a fast freeware web browser using Blink and Trident that also has security features and numerous tools including FTP, email, RSS, and more.
Opera Neon has all the Opera browser features you know with a reboot. It is designed to be a fun, fresh take on Speed Dial, visual tabs and the Omnibox, which kickstart your browsing session.