The two most prominent companies to do this were Microsoft and Adobe, but they actually still do have some one time purchase options remaining. They just stopped advertising them, and made them hard to find on their website.

MS Office: https://www.microsoft.com/en-us/microsoft-365/p/office-home-...

Adobe Elements: https://www.adobe.com/products/elements-family.html

Also, I have to be frank that both companies are trying to scam people with the subscriptions. Try a full month free, and if you forget to cancel get stuck paying for a full year. The scamming has damaged their reputation more than the actual subscription model.