Gradle Gradle is introducing Kotlin as a language for writing build scripts Corda Corda is an open-source distributed ledger platform, supported by major banks, and built entirely in Kotlin Evernote Evernote recently integrated Kotlin into their Android client Coursera Coursera Android app is partially written in Kotlin Spring Spring makes use of Kotlin's language features to offer more concise APIs Atlassian All new code in the Trello Android app is in Kotlin