I’m a huge fan of Ravelry for finding patterns. Also, when I started actually using the stash function, it became a game changer. I don’t have a huge stash (I know some do) but I still wanted to work it down, so for the last couple of years, I’ve found patterns for and queued stuff for most of my stash and have slowly been making my way through it.
I use the KnitCompanion iPad app for tracking my progress on patterns, and I love it, but I also have the old non-subscription version. Not sure I would use it if I had to pay a subscription.
I know a lot of people only use free patterns, but I gotta say that paying for patterns has really upped the quality of my knitting. Not universally of course; sometimes people want you to pay for something you could easily figure out for yourself, which is rather lame. But well-written patterns are golden, and worth the extra few bucks. When there is something new in a pattern that I don’t know how to do, YouTube is an amazing resource and I’ve never not been able to find how to do something there.