Write Once, Crawl Anywhere
- Quartz - an enterprise-grade job scheduler
- Rapidoid - An intriguing web framework.
- MapDB - An interesting serialization library
- Akka - the Actor pattern for both Scala and Java
- Spark - a nice, lean HTTP/route engine
- JD-GUI Java Decompiler, an awesome tool if you’re trying to debug stuff you’d ordinarily not have the source to.
- JamVM, a compact Java VM that happens to work fine on ARM architectures.
- Vaadin, a RIA framework.