- What problem does the software solve, and - roughly - how?
- How does it look? If it has any visual component, even if it's a CLI interface that's meant for human consumption, screenshots are mandatory. Screenshots + videos/ASCIInemas preferable.
- If there are alternatives you know of, mention them - be honest about when an alternative is a better fit than your project.
- What platforms does it work on? What are the requirements?
- How do I install it? In exact steps, for most common workflows. If that gets too long, link to a separate page containing these detailed instructions.
- How do I run it? Examples of common use cases, with exact invocations/procedures to perform.
- Any relevant remarks that could prevent me from installing or using the software.
- Links to further docs, project webpage, communities, etc.
When I evaluate a project - even briefly, skimming the repo README - these are all the points I'm on the lookout for - they're all helpful for deciding whether to look closer at the project, and possibly install and use it.