how about for 68k machines...
Something like
MS Office 95 Pro/Lotus Ami Pro etc
IE v5/Netscape 5.
those two programs run ok on low end hardware (I should know I put them on P1 laptops I sell for peanuts)
Funny thing is OpenOffice is a helluva lot slower than MS Office 2002/XP Pro I find aswell but anyway whatever is written would be best targeted @ OS4 IMO too.
As for what I would like, would be nice if something like Colin Mcrea 3 or the WRC games from the PS2 were ported, with a decent graphics card and an 800mhz processor surely this is possible with some tight coding (the PC version of CMR 3 was horribly inefficient and unoptimised bah!)