Okay so I had built CPOS (Competitive Programming Operating System) about 2 months back. It's an Open Sourced tool I developed for making the lives of competitive programmers easier. You probably already use CPH (Competitive Programming Helper). CPOS does what CPH does (of course much better), and has a million more features, you'll love them for sure. Below are the features:

1. Preview, Run, Submit problems from VSCode itself.
2. Compete with your friends by sending them a challenge
3. Expand a problem so that the redundant content on the right can be hidden
4. A whole terminal user interface where you can browse problems, view, run, submit etc.
5. Problem recommendations based on your weak areas, on both the Chrome extension and the TUI
6. In-browser editor if you do not wanna open a separate IDE
7. Live contest delta (banana)
8. Codeforces themes + modernize Codeforces
9. Works the same way on CSES
10. In-browser markup
11. and more :D

It crossed 4000 users today and I genuinely cannot believe it. If you would like to try it yourself (please do), below are the links:

CPOS

My Github