The best apps I have on my list for Standby Mode in terms of offering a variety of interesting 3rd party standby widgets!
iScreen - apps.apple.com/au/app/iscreen...
Quike - apps.apple.com/au/app/quike-w...
MD Clock - apps.apple.com/au/app/md-cloc...
Lookup - apps.apple.com/au/app/lookup-...