I use kaspersky internet security and I have been using the same for almost 4-5 years now. It's really good and I can't imagine myself using anything else. I guess that is the only premium software that I use. What about you guys?
If subscriptions are included, I have Discord Nitro and Nico Nico Douga Premium.
I used to have Clip Studio Pro when I still had Pixiv Premium, but the software didn't work well on Linux, I never used Pixiv, and I don't draw.
So I cancelled that subscription, and with it lost access to Clip Studio Pro.
I have been thinking of getting the paid version of domdomsoft manga downloader. It isn't much but I am not much of a manga reader....but lately I have been thinking of getting into manga as well.