assembly
apl (k4)
forth (bootloader)
snobol (spitbol)
C (small subset)
sh (Almquist-like)
sed (not GNU)
nawk (do not use added functions such as strftime)
execlineb
I occasionally pull out SNOBOL4 as a less-awful awk, mostly for poking around/formatting logs and such. Not a bad language honestly. It's aged very well.
People mention it here on occasion for how it handles string processing. Experts in such things might want to dive deep in a review of it for the rest of us.
Icon was also produced by the same man, Ralph Griswold. And it has inspired a newer incarnation, Unicon. I imagine each would also be pretty good at string processing.
