It's trying to start the nonexistent apps.
From the console entry
com.apple.launchd.peruser.502 we know it's trying to start on behalf of user (instead of system or administrator) that has UID 502.
You can get particular user's account name with
id -u -n 502.
I'd look at following places:
Go to System Preferences->Users & Groups. Choose appropriate user and select Login Items tab.
Look if you recognize uninstalled applications in the list and delete them. You have to select the app and press '-' beneath the list.
Start the terminal. Enter
launchctl list and see if you find uninstalled apps in there. False entries can be removed by
launchctl remove label, for example
launchctl remove de.novamedia.NML2NDeviceObserver.
Repeat the process, but this time prepend
sudo to commands, like
sudo launchctl list, to catch all the apps executed in system context.
You can find out more about launchd and launchctl by entering
man launchd and
Look into following directories (from
~/Library/LaunchAgents - Per-user agents provided by the user
~/Library/LaunchAgents - Per-user agents provided by the administrator
/Library/LaunchDaemons - System wide daemons provided by the administrator.
/System/Library/LaunchAgents - OS X Per-user agents
/System/Library/LaunchDaemons - OS X System wide daemons
If you find a file referring to uninstalled app, remove it (you'll need to
sudo rm for items in 3, 4 & 5).
More about those files in http://developer.apple.com/library/mac/#documentation/MacOSX/Conceptual/BPSystemStartup/Chapters/CreatingLaunchdJobs.html especially 'The launchd Startup Process'.