clippard
smc
burkert
numatics/asco
mac
parker hannifin/Honeywell/Paul/
Kip
and many others.
they all make the solenoids that are good for our use, but you need to know which are the right models for our application.
2 way/ports normal close, or 3 way/ports solenoids are OK(5 way ok too, but you need to know what port to connect).
working pressure(range), power consumption(wattage), power input, connection port type are the major factors to decide a right solenoid.