The NeXT community is delightfully dedicated (not quite "Amiga people," but solid) and there are several good online archives of free software, as well as a surprising amount of at-the-time-expensive commercial software where there are negotiated free keys, or other low-cost copyright-holder blessed modern distribution (largely thanks to the efforts of the folks at Black Hole Inc.)

Finding software for white-box x86 OpenStep turns out to be somewhat harder than for the fetishized black-box 68k NeXT machines.

I recently put together a nice ca. 1997 OpenStep 4.2 machine on top of a Thinkpad 560E ($20 machine...plus $80 of accessories/upgrades and $100 worth of SCSI2SD and proper chain of adapters...), which has been a blast. It's happily running (or as happy as OpenStep ever is, its a hair sluggish next to ... basically all of its contemporaries) with full driver support and such. Current fight is that it doesn't seem to believe in netmasks other than 0xffff0000 so it's been a little fussy to have connected on my network.

I've in particular been looking for some decent serial communication/terminal emulation software that actually supports OpenStep on x86 (not just NextStep on black hardware with their various generations of mutant serial ports), I like being able to zmodem files around between vintage machines and kermit is a little cantankerous.