mongo-gui seems quite nice, though not that feature rich - you essentially get the ability to view, search and add/edit documents (including importing from files), but nothing more advanced like indexing, schema analysis, explain plans, aggregation pipelines etc.
The UI is quite clearly based on Compass, but it's a positive honestly 🙂 Though it doesn't seem to be responsive at all, so it's not great on phones.
mongo-express has a couple more features, like creating/removing indexes, GridFS support, media preview, some statistics or exporting collections, but the UI is just the most basic Bootstrap 3 UI possible. It is somewhat responsive tho - at least to the point that it's still usable on a phone.
adminMongo would IMO be the best one - with most of the important features of mongo-express (without GridFS and media preview, but with user management which seems more useful tbh) and actually quite nice (and responsive!) UI. There is a problem though - it's no longer maintained. It works, even with NodeJS 14, but npm will warn you about some dependencies being deprecated when you're installing it... And who knows how long until it breaks. There may be some fork that is maintained, but I haven't bothered looking - I'm sticking to Compass for my GUI needs anyway 🙂
There is also Mongoku, but I also don't think it's maintained and from my quick testing it seems to be even a bit more limited than mongo-gui (possibly has better GUI for queries, but that's all). The UI is kinda nice tho - but also not responsive.