I use N and it's great

I wish it had a better name. It's almost impossible to find by googling. Maybe that's why it's not more popular?

Maybe - I found it referenced by a post someone made talking about Node and how to test out newer versions of node.

They also mentioned NVM (like RVM) but said it could corrupt your bashrc file... since I'm not the most experience of linux user just yet, I stuck with N. Haven't had any regrets.