What browsers are available for the Acorn RISCOS system?

arcweb
ArcWeb is a World-Wide Web browser for Acorn RISC OS computers, with RISC OS 3.1 or later.
webster
Another browser, about which I have no further information.
Both browsers can be obtained by anonymous FTP from micros.hensa.ac.uk in the directory micros/arch/riscos.
World Wide Web FAQ