Identify Menu Bar App — Up Arrow Line Underneath

You need Bartender, which allows you to control what displays where in the menu bar.

Organize your menu bar apps

• Lets you tidy your menu bar apps how you want.
• See your menu bar apps when you want.
• Hide the apps you need to run, but do not need to see.
• Have the clean looking menu bar you want.
• Rearrange your menu bar items as you wish.

I may be misunderstanding, but to remove items from Finder's menu bar is quite simple:

Hold down Command and drag the icon from the menu bar. Poof! It's gone.

This works for all Apple based menu bar items, and some third party items. Usually, when it doesn't work for a third party application, there is an option within the app itself to remove its icon from the menu bar.