Also confusing as there is a small mammal that eats snakes called mongoose.

Also confusing when there is a vehicle in the Halo series called Mongoose. Confusing, confusing...

its quite a cool mammal :)

Disagree with the downvote. Never used mongoose, nor am i a node developper, yet my first reaction was to wonder why a js db library evolved in an iot framework.

I think Mongoose was called mongoose before mongo db plugin existed.

https://github.com/cesanta/mongoose - that's the project from which Mongoose OS stems.

Mongoose, not to be confused with Mongoose.

https://metacpan.org/pod/Mongoose

This one is the best named of the 3. It's actually a simple contraction of Mongo + Moose, the two key libraries used in the project.

Also an embeddable http server.

I think developed by same people: Cesanta

Not the first and not the last:

spark(hadoop tool vs java framework), yarn (hadoop tool vs facebook pkg manager), ...