I use GitHub Copilot very frequently for any programming I do.

I also use BingChat very often, I consider it to be a very underrated tool that people haven't fully explored. Of course, it's great for when you want your LLM queries augmented with search results. But BingChat can also view the current webpage, so for example you can pull up papers and ask BingChat questions about it. I've used it to help write abstracts for my papers. When I do this, BingChat literally searches up "how to write an abstract" which I found absolutely hilarious , it's like it's learning skills on the go as well. I didn't use the outputs directly, but it served as useful inspiration. I think BingChat uses a mix of models including GPT-4, all for free! Apparently more features are coming soon, including multimodal features.