AROS Research Operating System (AROS – pronounced "AR-OS") is a free and open-source multi media centric implementation of the AmigaOS 3.1 APIs. Designed to be portable and flexible, ports are currently available for x86-based and PowerPC-based PCs in native and hosted flavors, with other architectures in development. AROS, in a show of full circle, was also ported to the m68k-based Amiga 1200, and there is also an ARM port for the Raspberry Pi series.
Icaros Desktop is your all-in-one solution to any Amiga-related need. It is a full operating system for PC with a complete Amiga-like environment which can run on cheap, common hardware or into a virtual machine, and it is based on AROS: a free, open-source rewrite of AmigaOS 3.X by a team of talented and motivated developers. Icaros Desktop runs Amiga software recompiled for the PC platform and even native Amiga games and applications, eventually integrating them on your desktop. Icaros Desktop turns your common PC into a full-fledged Amiga-like computer, the one you’ve always dreamt of, back in the 90s. With Icaros Desktop you can bring back the old-days fun, and enjoy a full Amiga-like experience, with today processors power and speed.
This is feels like the best and most well supported version of Aros and is the one I would recommend if you want to try out Aros.
Last Update: Dec 2019
AfA OS (Aros For Amiga) / Aros One
AmigaSystem a great user,developer and supporter of Aros has put together a number of handful easy setup of Aros for Classic Amiga, Virtual Machine and even native x86 systems. This also contains a lot of best apps and tools all setup and built into the OS.
Last update: 2019
http://eab.abime.net/showthread.php?t=97987 - Aros ONE x86
http://eab.abime.net/showthread.php?t=98062 - Aros ONE 68k
http://eab.abime.net/showthread.php?t=99043 - Afa One 1.3
Aeros / Aros Broadway
AEROS is a hybrid distribution of AROS (www.aros.org) and Linux (in the moment debian 6.0 for X86 and 8.0 for ARM is used) available for ARM and x86 systems. The main befit of this version of Aros is that it runs Aros on top of the linux system and allows the user to access and run Linux apps as if they where running on Aros. It also had a version focus of supporting the popular Raspberry Pi Platform.
Cost: 29 Euros
Last Update: 2018
This is a 68k focus version of Aros for Emulation, Vampire boards and real classic Amiga hardware. Aros vision has WHDLoad pre-setup and has a handy list of games and programs that are compatible with just the Aros Roms.
Last Update: 2019
This is a 68k focus version of Aros squarely aimed at being Vampire boards official OS, largely due to many legal issues surrounding the official AmigaOS, Apollo and the Vampire team has decided to throw support to the 68K version of Aros and make there own fork of it for their Vampire systems, currently in very early development, but this should hopefully this should be the best version of Aros 68k due to the extra resources a vampire offers.