Custom post likes, share, related etc.

Hi guys,

Got few difficult questions (difficult for me).

I've tried JetPack and it's awesome, but every single plugin needs confirmation and login to which is not acceptable, so I was wondering are there any similar plugins they are offering in their settings.

I need just few of them:

1.Simple like button to my multisite post, not facebook likes (JetPack has one)

2. Related posts

3. Simple share buttons without options for my user to modify it.

Any help is more than appreciated.