"ZipCloud" is some sort of cloud-storage service with a doubtful reputation. The OS X client is sometimes distributed along with malware. Although ZipCloud may not be malicious itself, it should be deemed suspect by virtue of the company it keeps.
To remove ZipCloud, start by backing up all data (not with ZipCloud itself, of course.)
Quit the application, if it's running, and drag it from the Applications folder to the Trash.
Triple-click anywhere in the line below on this page to select it:
~/Library/LaunchAgents/com.jdibackup.ZipCloud.autostart.plist
Right-click or control-click the highlighted line and select
Services ▹ Reveal in Finder (or just Reveal)
from the contextual menu.* A folder should open with a file selected. Move the selected file to the Trash.
In the same folder, there may also be a file named
com.jdibackup.ZipCloud.notify.plist
Move that to the Trash as well.
Log out or restart the computer and empty the Trash.
*If you don't see the contextual menu item, copy the selected text to the Clipboard by pressing the key combination command-C. In the Finder, select
Go ▹ Go to Folder...
from the menu bar and paste into the box that opens by pressing command-V. You won't see what you pasted because a line break is included. Press return.
As for "adwaremedic," it's not needed if genuine, and if not genuine it may be malware. Any software that you didn't intentionally install should be deleted, no matter what it is.
This website is rife with propaganda that "adwaremedic" should be used to remove common types of adware, contrary to Apple's recommendations. The predictable result will be that malware attackers will take advantage by distributing their own malware under that name and infesting the Web with links to it. I wouldn't be at all surprised if it's already happening.