PurgeTab (source) is a userscript that adds buttons (located in the "more" tab for vector users) to purge, hard purge (forcerecursivelinkupdate=1), and null edit.
cuStaleness (source), adapted from en:User:Writ Keeper's enwiki script, shows whether a user or IP in a checkuser template is stale (too old) or not on COM:RFCU and subpages.
sockStaleness (source), adapted from en:User:Writ Keeper's enwiki script, shows whether a user or IP in a checkuser template is stale (too old) or not in sockpuppet categories.