Backlink check and seo
 

Hey, I would like to know what you people use to evaluate backlinks? (What software, tools, extensions?)
Any good seo free seo software? After relaunching my site I would like to control this a bit more than just on page seo.

And last question, have some sites with tons of backlinks (some tubes, on all pages, gives me around 250'000 backlinks), but they have no DA, MR or PR, should I try to get them away?

Thanks for any advice.