Oh wow, lots of utils/etc. for OS3.1 ... Tho, A warning: i am on 3.9 atm, sorry if any of these are OS3.9 only..
Directory Opus 4.12... I just never cared for V. 5/Magellan, and the like..
AudioMasterIV, DCTV Paint, Dpaint 4 + 5, FTW, obviously! ImageFX, Brilliance2 (alil buggy on my '060, tho) SnoopDos, EaglePlayer fer sure, CygnusED (in my C: drawer) BootChange (random WB/Window backdrops and system sounds) , another 'startupsound' I think, to play any sample on the opening of the WB window, ... hmm, for an '060, OxyPatcher , Fblit, ...
Oh, dang... my personal 'killer app' for my miggies: LightWave3D V. 5 !!!
Hardly a 'must-have' program.. but w/ an '060... ya gotta check out the fractal program 'ChaosPro'.... Makes INcredible images.. and if ya gotta photo printer, they print beautifully too...