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Check the apps' preferences for the option to remove them. I don't know about your specific apps, but I used the launcher program called Alfred. It's always running (login item), but it provided the option to not show it in the dock, even while running.
 
Try Dockless. Be aware that you won't have access to the menu bar for apps with the dock icon hidden. You can still access menu bar items through keyboard shortcuts though.
 
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