You can easily install openwrt on most of MikroTik routers. Rb5009 is also supported now if you need more powerful router.
78 devices in total when you filter for mikrotik -> brand column.
That table is a much longer list! Still no love for my CRS/CSS, but it does look like that's probably most of the RB devices that Mikrotik actually intends for use as routers (rather than L3 switches).
Also has supported release version column, which is useful to have.