Water's taste changes every two coss, and the language every four.
—a Hindi proverb
Aryaman had a brief but wondrous time where he seemed to be able to lay down the law with the Indian editors and stop them from squabbling through authority alone.
Various iterations of inflectional templates (now modules), the latest of which is initiated by @Benwing2 ({{hi-conj}}, {{hi-ndecl}}, {{hi-adecl}}).
Other Indo-Aryan languages
A lot of entries.
Worked on/created transliteration modules for many many scripts, often with @Atitarev, @Wyang, @Kc kennylau, @DerekWinters. (Good times.)
Created lots of entries, infrastructure (templates, organization, etc.), and standardized formats for Sanskrit with @Bhagadatta and @JohnC5.
Structured the phylogenetic treatment of NIA and MIA languages.
Started (or played a significant role in) coverage of MIA languages (Prakrits, Pali, Ashokan) and Early NIA languages (Old Hindi, Old Marathi, etc.) with @Bhagadatta and @Kutchkutch. Created MOD:inc-ash/dial for Ashokan dialectal organization.
Indo-Iranian
Laid the foundations for and started our treatment and coverage of Proto-Indo-Iranian and Proto-Indo-Aryan with @Victar, @Bhagadatta, @JohnC5. Not an Iranicist, however.
Avestan, Old Persian.
Also have made some PIE entries.
Others
CAT:San Juan Quiahije Chatino verbs imported from fieldwork by Hilaria Cruz. Ultimately looking into making a Python module to simplify this kind of uploading.
Indian English. Occasionally other domain-specific English entries.