Without a Slot 2 RAM expansion, you only really have one other choice.
Bunjalloo. I use it. It works well enough for simple things. It's no good for much beyond text and picture viewing though. It can't do videos of any kind, flash, or any kind of music playing. It will break when trying to load a site with videos on the page if you have images enabled.
Basically. It is a very basic browser. You also have to learn it. It isn't just pick up and use. You have to learn how and when to activate cookies, and the cache needs to be cleared out every now and again straight from the MicroSD card.
There is also Hobro or something like that, but I could never get it working.