User / Post admin screen mod

[aalhait]

I am looking for a mod to be able to find users and then check all / select unselect boxes next to the search users screen and Delete or (operations on the selected only)

Same for posts...

Scenario:

Do a search on a field from user account: (anyone withe SEO in their title for example) or a link in their signature. (http) for example
Or another search criteria is all users from XXX.XXX.XXX.XXX ip
The be able to select All/ unselect some if they are exceptions and then delete users with (2 options) delete while removing all their posts. Or delete and make their posts appear as unregistered users.

The same would apply for posts (if possible)

Thanks