You've already answered your question...just Google them one at a time!
You can also try looking at the "man", (manual), pages for each app...although some don't have one at all. To view the man page for an app, type man before the application in a prompt window, for example:
displays the manual page for Airodump.
But instead of trying to work out what each tool does, try working out what you want to do and then Google that...this will lead you to apps in BT which will allow you to achieve it, (after a lot of head scratching).