There are many other ways of accessing the stack exchange websites, but they don't offer full interactivity.
Check out http://stackapps.com/https://stackapps.com/ - there's a reasonably comprehensive list of apps/sites that utilise the API. Some of them are alternate browsing methods.
Shameless plug for the one I wrote: http://stackapps.com/questions/542/column-80-plain-text-optimised-sofuhttps://stackapps.com/questions/542/column-80-plain-text-optimised-sofu