Rankings
Top 20 repos in each star tier, ranked by AI quality score.
JetBrains' official coroutines library is the standard async foundation for every Kotlin project
Timber: the de facto Android logging abstraction layer, 13 years old and still actively maintained
JetBrains' Kotlin-based UI framework brings shared declarative interfaces to Android, iOS, desktop, and web
Kotlin/Compose Multiplatform anime tracker with BitTorrent, danmaku, and Bangumi sync — 18k stars and actively developed
Lottie React Native brings After Effects animations to iOS, Android, and Windows via a thin native wrapper
Facebook's Android image library Fresco hits v3.7, still actively maintained a decade in
Komi Store brings a polished app-store UI to GitHub/Codeberg/Forgejo releases across Android and desktop
Quarkdown brings Turing-complete scripting to Markdown for multi-format document publishing
Maestro brings YAML-based simplicity to mobile E2E testing across Android, iOS, and web
JetBrains' official Kotlin-native async web framework powers microservices and HTTP clients
Open-source Android image editor with 40+ tools, 13K stars, and active daily development
Thunderbird for Android: Mozilla-backed open source email app with 15 years of lineage as K-9 Mail
Coil brings Kotlin-native, Coroutine-powered image loading to Android and Compose Multiplatform
IntelliJ plugin brings multi-engine translation directly into the IDE for developers working across language barriers
MaterialDrawer: A long-running Android navigation drawer library now on Material 3
Curated Kotlin resource directory with 11K+ stars and an active companion website
AnkiDroid brings battle-tested spaced repetition to Android with 10+ years of active development
Unciv: A FOSS Civ V clone with 10K+ stars, active development, and cross-platform reach
Open-source Android weather app with 50+ data sources and Material 3 UI
AppIntro: A decade-old Android onboarding library still shipping updates in 2026