as actually working alternatives for amiga there are two possibilities so far: netsurf port by artur, which is available from aminet and aros owb which is also based on sdl, while actually working and providing a simple but complete user interface. to run it you have to run aros68k though.
There's also my alpha NetSurf with a proper UI, but it's slow and unstable. I've fixed some bad startup crashes, but I'm getting mad graphical corruption (flickery screen, complete crash) which I need help with, along with fixing an optimisation bug. I'll post a new download at some point, I'm waiting for the current JS work to stabilise.