Note: Some of these may be false positives and don't need correcting as they may just be strings or variable names, not actually resulting in API queries...
reedy@deploy1002:~$ mwgrep action=tokens arwiki MediaWiki:Gadget-AjaxMove/Flash.js enwiktionary MediaWiki:Gadget-PatrollingEnhancements.js fawiki MediaWiki:Gadget-igloo/flash.js fiwiki MediaWiki:Gadget-PendingChangesDiff.js lezwiki MediaWiki:Gadget-wefcore.js mswiktionary MediaWiki:Gadget-PatrollingEnhancements.js nnwiki MediaWiki:Gadget-PatrollingEnhancements.js plwiki MediaWiki:Gadget-CzyWiesz.js pswiktionary MediaWiki:Gadget-PatrollingEnhancements.js ukwiki MediaWiki:MassRollback/Flash.js urwiki MediaWiki:Gadget-AjaxMove.js (total: 11, shown: 11) reedy@deploy1002:~$ mwgrep --user action=tokens enwiki User:Anupmehra/delsort.js enwiki User:Callanecc/AnimumEasyblock.js enwiki User:D'SuperHero/common.js enwiki User:DUCKISJAMMMY/common.js enwiki User:DUCKISJELLY/common.js enwiki User:DUCKISPEANUTBUTTER/common.js enwiki User:Darkwind/easyblock-test.js enwiki User:DutchTina/easyblock.js enwiki User:Evano1van/ProjectTagger.js enwiki User:Fox Wilson/delsort-beta.js enwiki User:Fox Wilson/delsort-monobook.js enwiki User:Fox Wilson/delsort.js enwiki User:Gene93k/delsort2.js enwiki User:Gene93k/fwds-fork.js enwiki User:Hasley/easyblock.js enwiki User:Jim Carter/deletion sorting app.js enwiki User:Josve05a/ProjectTagger.js enwiki User:Kaldari/tokentest.js enwiki User:Kangaroopower/Flash.js enwiki User:Kashmiri/Flash.js enwiki User:Lightburst/common.js enwiki User:Lionelt/delsort-monobook-test.js enwiki User:Mr RD/afcsort.js enwiki User:Mr. Stradivarius/delsort.js enwiki User:MrX/delsort.js enwiki User:Mrt3366/delsort.js enwiki User:Padenton/DelsortMenu.js enwiki User:Padenton/delsort.js enwiki User:Philg88/delsort.js enwiki User:Rebbing/script/deletion-sorting-helper.js enwiki User:Rhododendrites/scripts/delsort-all.js enwiki User:Rhododendrites/scripts/delsort-monobook-all.js enwiki User:Sven Manguard/delsort.js enwiki User:Vermont/easyblock.js enwiki User:Zpeopleheart/delsort.js eswiki User:Hasley/easyblock.js eswiki User:Sargento de Hierro/easyblock.js fawiki User:Jeeputer/easyBlock.js idwiki User:Gervant of Shiganshina/Peralatan/Flash.js idwiki User:Hidayatsrf/easyblock.js metawiki User:Vermont/easyblock.js metawiki User:Герман Мейстер/global.js plwiki User:Hebius/common.js plwiki User:Kaligula/js/CzyWiesz.js plwiki User:Kaligula/js/Gadget-LittlePages.js plwiki User:Paweł Ziemian/CzyWiesz.js plwiki User:Sidevar/CzyWiesz.js ruwiki User:Absconditus/is.js ruwiki User:Absconditus/reporter.js ruwiki User:Andrey/common.js ruwiki User:ArkusPerson/monobook.js ruwiki User:Attendant/common.js ruwiki User:Bаki/common.js ruwiki User:HarDNox/monobook.js ruwiki User:Hercules63/reporter.js ruwiki User:Jimi Henderson/reporter.js ruwiki User:Maksim Fomich/common.js ruwiki User:Milez189/reporter.js ruwiki User:Skmp/LEP personal.js ruwiki User:Skmp/LEP test.js ruwiki User:Skmp/LEP.js ruwiki User:Skmp/rq.js ruwiki User:Skmp/userwarner personal.js ruwiki User:Skmp/userwarner.js ruwiki User:Vicpeters/stukach.js ruwiki User:Wanderer777/reporter.js ruwiki User:WikiUserFS/ownreporter.js ruwiki User:Арсений1/reporter.js ruwiki User:Хедин/userwarner.js simplewiki User:Operator873/Flash.js testwiki User:Absconditus/is.js testwiki User:Absconditus/reporter.js testwiki User:Felix Dzerzhinsky/common.js testwiki User:Grind24/easyblock.js testwiki User:Murbaut/easyblock.js testwiki User:Murbaut/eb.js wikidatawiki User:JJBullet/Flash.js wikidatawiki User:JJBullet/easy-block.js (total: 78, shown: 78)