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.