DOS 3.1 (lol).

Cool Edit Pro 2.1

-Susan

Hardware: My 27-year old Yamaha DX7.

Software: NI Pro-53. I'm sooo mad at NI for discontinuing that thing. What were they thinking?

Hardware: A Bouzouki bought in 1980
Software: Probably CD Architect

> What is the oldest software that you just can't stop using?

XP and Vista.
Oh wait a minute not with X2a anymore (thank God we've put those to bed, maintenance is so much easier).

Yamaha G100 Stack with 6-10 cabinet... The Cleanest, Clearest guitar amp I have ever owned. Also Fostex cassette 4 track recorder... I use it as a headphone amp now :) It works so why not? I paid $800 back in the day.... if someone wants to bellyache about equipment costs I can only look back at that thing and think... "what was I thinking?"

1990 midiman FineLine mixer

Treefight


BBE Sonic Maximizer plugin

Har-Bal

As for music software - Ditto

Win XP Sonar 8.5.3 Sonar Live (on DOS)

Benny Bear

What is the oldest software that you just can't stop using? You try to give it up but you just find yourself using it again?
 
Mine is the B4 II

I use the B4II frequently, but I didn't realise how old it is until I just looked it up (2000).  I'm not planning to give it up any time soon.  It's not as good-sounding as the GSI VB3, but it's a lot more versatile.