1.JetBrains / kotlinThe Kotlin Programming Language. kotlinprogramming-languagecompilergradle-pluginmaven-pluginkotlin-library+3 moreKotlinNo license54K total6.5K forks+141 starsfrom 53,392 · score 4.96
2.Kotlin / kotlinx.coroutinesLibrary support for Kotlin coroutines kotlincoroutinesasyncKotlinAPACHE-2.014K total1.9K forks+13 starsfrom 13,809 · score 2.64