Kill OSX menubar process

Question

I have several menubar programs/processes/applications that start up automatically. I would like to be able to turn them all off with a single command or script; there are times when bandwidth is limited or restricted and they cause (or at least contribute to) the spinning beach ball of death. Currently, I close each one individually by hand.

Following the answer(s) here I am able to easily find and target a process to be killed. But, is there an indicator for a menubar process? When I do find one by looking through the active processes and kill it (manually) it immediately gets started up again. The comments on this superuser question seem to mean that the answers didn't work, and I dont want to kill the entire menubar.

Specifically, the processes I have and want to shutdown are Dropbox, Google Drive, and Evernote.

Answer 1

Thanks @Jeroen the answer at https://superuser.com/questions/648696/how-to-stop-and-start-dropbox-app-in-apple-terminal did work for me.

osascript -e 'tell application "Dropbox" to quit'

Just substitute in the application to quit.