PhpMyAdmin for NoSQL?

I can't comment on your main question but in terms of your P.S...

NoSQL is a very vague term.

In practice are basically three 'types'. Document databases, graph database and column databases. Depending on your requirements you should choose the correct type (or types, often it is best to use a mix of database engine, including relational which is by far the most common). Flat file databases should also not be overlooked.

I thoroughly recommend this video:
youtube.com/watch?v=qI_g07C_Q5I

Seriously, its worth watching.

Once you know what your architecture will look like, you can choose specifically which engines are best for you. For document orientated databases I know that Mongo is very popular.