RapidDisk is an advanced Linux RAM Disk which consists of a collection of modules and an administration tool. Features include: Dynamically allocate RAM as block device. Use them as stand alone disk drives or even map them as caching nodes to slower local disk drives.
I pushed it into the mainline last Sunday. Yes, I know, I am a bit late with this announcement.
The Solus operating system is still under construction, and it looks like a lot of cool packages are getting implemented, including a new one called DoFlicky that will help users to install drivers much easier.
KaOS Linux calls itself a "lean KDE Distribution", and it is certainly that, at least in terms of what is actually offered for download. Go to the KaOS Download page and you will find exactly one file (a 1.6GB hybrid Live ISO image) with one desktop (KDE Plasma 5.4) and one architecture (64 bit). No huge 'all-in' 4+ GB installer or tiny 'netinst' core-only installer, no other desktops (not even community editions), and no 32-bit version. Lean and focused.