Most KaBar folders (Dozier, Piggyback, Mule, Baconmaker), Ontario (Utilitacs and RATs), Kershaws (Zing, Shallot, Skyline, Scallion, Oso Sweet, Amplitude, Chill, Link), SOGs (Flash I and II, Zilla, Twitch), Cold Steel AUS 8s (Voyager, Recon, ProLite, Tuff Lite, Lone Star Hunter), Buck (Spitfire, Bucklite), CRKT (Padoza, Drifter, Squid, Krawford Kasper), Spyderco and Byrd (Raven, Crow, Cara Cara, Tenacious, Resilience, Ambitious, Persistence, Meadowhawk), some SRM, ENLAN, Ganzo and HARNDS (Viper, Nyx), ESEE (Avispa, Zancudo)...
And then there's the classic ones: Victorinox, Opinel, Laguiole, Higonokami, Svord...
All these will prove valuable folders with good/standard steel and serviceable features/construction
Good Luck!