I have been trying Notion's Projects & Tasks. Other well-known tools have not quite fit me, and I actually wanted to use GitHub Projects, but since the new Projects are no longer repository-based and can create issues in any repository, I am too nervous to use them. Notion is definitely excellent for wiki-like things, so I have some hope that Projects will be similarly good. I tried the setup that includes Sprints too, but the database relationships were so complex that it felt like I would lose track of everything, so I started with only a simple board and project relationship.