Profile builder plug-in for simple blog

Hi guys,

I made a blog in order to present some of my ideas related to one business project that we are working on.

Beside content that I want to publish there, I need also Register/LogIn section for my visitors and I need option when some visitor create his/her profile/account to be able to see profiles of other visitors that already registrated (I don’t need to protect any part of my published content to visitors who don’t register).

So basicaly I need inform & register blog type.

Can you suggest me some free/paid plugin that can provide me this solution?

Thank you in advance and all the best in 2015! 🙂