Compatibility

GNU/Linux:

• Intel x86 CPU-family, GNU/Linux (libc5 and glibc2)
• DEC Alpha (glibc 2.0)
• PPC (YellowDogLinux 2.1; Mandrake Linux 9.1; Gentoo 1.4)
• Sparc 5 (32 bits), glibc 2.1.3, gcc 2.95.3
• Sparc ultra 1 (64 bits kernel, 32 bits userspace), glibc 2.1.3, gcc 2.95.3
• StrongARM (33MB RAM, armedslack/gcc-3.4)

*BSD

• NetBSD (in pkgsrc)
• FreeBSD (in the ports)
• OpenBSD (in the ports)
• DragonFlyBSD (out of the box).

OS X:

• MAC OS X
• GNU Darwin! (Power PC and x86)

Solaris:

• Sun Blade 100 (Ultra SPARC III), Solaris 8, gcc 3.0
• SunOS jaca 5.7 Generic_106541-04 sun4u sparc
• Sparc ultra 10 (64 bits) solaris 8, gcc 2.95.2
• Solaris 2.6 (SunOS 5.6), gcc 3.3, Sparc & UltraSparc
• Sun Ultra 5, Solaris 10, 64bit sun4u, gcc 3.4.3

Handhelds:

• iPAQ handheld! (familiar distribution) --screenshots
• Psion handheld 5MX/5MXPro (CPU: 32bit ARM 710T, 37MHz) --Debian ARM linux
• Intel's StrongArm CPUs!
• GMATE's Yopy
• NetBSD, which includes dillo, has been ported to several StrongARM and MIPS based handhelds.
• Simputer (encore; picopeta)

Miscellaneous:

• SGI O2 running IRIX
• Tru64 (OSF1) 4.0 on Alpha
• HP 9000 715/80 with Debian hppa
• 68k Linux on Q40 and Q60 (sinclair QL compatible machines)
• QNX RTP 6.1/x86 (with occasional memory faults out of GTK+)
• AIX 4.3 (with some tweaks)
• SONY PlayStation2 (Linux)
• Atari-based 68k-systems running MiNT as OS! (see)
• Microsoft Windows using Cygwin
• RISC OS! Screenshot available here