What it does is put a different user interface on Microsoft IE's page-rendering engine. It can also bookmark a group of pages, opening them all at once. A free ad-supported version and an inexpensive commercial version are available. Conversay Voice Surfer is an interesting alternative, especially for someone with physical disabilities that make mousing or even keyboarding difficult. Web sites that take advantage of Conversay's technology can be used interactively, talking to the user and responding to what you say.
Lynx is a free text-based browser, a fact which speeds up page loading incredibly.
The bad news is that web developers are getting really bad at designing sites to be usable without graphics, so it's getting harder to use Lynx all the time. But there are versions available for most text-based operating systems , including many handhelds, good ol' DOS, and Unix shell accounts. It's being updated frequently, and makes an old 386 with 4MB of RAM a viable web-browsing machine.