ArcaOS is described as 'A new OS/2-based operating system from Arca Noae, codenamed Blue Lion, arrived today, May 15, 2017, after nearly two years in development' and is a operating system in the os & utilities category. There are more than 100 alternatives to ArcaOS for a variety of platforms, including Linux, Self-Hosted, Windows, BSD and Mac apps. The best ArcaOS alternative is Linux Mint, which is both free and Open Source. Other great apps like ArcaOS are Ubuntu, Debian, Fedora and Arch Linux.
DeLi(cate) is a fork of DeLi Linux 0.8 targeted at very old and low RAM computers. It also works very efficiently on ordinary computers where you want to run lightweight applications and avoid the bulk of ordinary distributions.
