Toggle Dropbox and Google Drive

toggle_dropboxgdrive.plist

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
  <dict>
    <key>Label</key>
    <string>org.yourname.toggle_dropboxgdrive</string>
    <key>ProgramArguments</key>
    <array>
      <string>osascript</string>
      <string>/Applications/toggle_dropboxgdrive.scpt</string>
    </array>
    <key>RunAtLoad</key>
    <true/>
    <key>StartInterval</key>
    <integer>3600</integer>
  </dict>
</plist>

toggle_dropboxgdrive.scpt

launch application "Google Drive"
launch application "Dropbox"
display notification "Started Dropbox/Google Drive, waiting for 10 minutes."
delay 600

tell application "Dropbox" to quit
tell application "Google Drive" to quit
display notification "Stopped Dropbox/Google Drive"