Opera Mini 5.1 for our HTC Wildfire, Legend, Desire, Desire HD, Desire Z, Hero, Evo, Nexus One or any Android device, is a great web browser that is sure to become your default browser. This version 5.1 introduces better memory management, a new optimized browser skin allowing for more pages to be open at the same time, more rapid scrolling through pages, and overall improved browsing performance.
According to its developers:
Opera Mini compresses data by up to 90 percent before sending content to the phone, resulting in faster page loading and speed. This compression dramatically reduces data load, which translates to lower browsing costs when on a pay-per-MB data plan, especially when roaming.