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Graal
GraalVM compiles Java applications into native executables that start instantly, scale fast, and use fewer compute resources 🚀
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Codename One
Cross-platform framework for building truly native mobile apps with Java or Kotlin. Write Once Run Anywhere support for iOS, Android, Desktop & Web.
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
I really wish GraalVM would support iOS https://github.com/oracle/graal/issues/373
GraalVM is a set of tools. It's hard to cover in one reply... The big feature is it's probably the most advanced JIT optimizing compiler available outside of research. It can run _a lot_ of different languages too and it's cross platform by default. It will literally run on any device that can run a JVM, and even some that can't. It's also written in a language (Java) that's far more accessible for people to make compiler enhancements too, hence it's meteoric rise.
Another big feature is it's Native Image feature, which is an AOT compiler. You can make a native executable out of a Ruby, Java, JS, or Python program, with some asterisks. I think Quarkus' benchmarks really speak to why this feature is valuable (scroll down on this page) https://quarkus.io