New information:
I've realized that what I'm looking for are finder plugins (I should have realized that sooner), even though the parent PID is launchd. I still can't figure out where finder plugins are stored.
Some of the process names are:
Seafile FinderSync
Dropbox Finder Extension
Box Sync Finder Extension
Original post:
I'm going nuts trying to figure out how some processes are being automatically launched. The parent process is launchd (PID 1), but I can't find reference to them in any of the usual locations:
~/Library/LaunchAgents
/System/Library/LaunchAgents
/System/Library/LaunchDaemons
/System/Library/StartupItems
/Library/LaunchAgents
/Library/LaunchDaemons
/Library/StartupItems
I have also checked out cron:
/usr/lib/cron/tabs
crontab -l
sudo crontab -l
And ~/Library/Preferences/com.apple.loginitems.plist
is empty.