- Docker Hub https://hub.docker.com/
- Vagrant https://www.vagrantup.com/
- Boxes search https://atlas.hashicorp.com/boxes/search
- Mastering Markdown(GFM GitHub Flavored Markdown) https://guides.github.com/features/mastering-markdown/
- Gradle https://gradle.org/
- Maven https://maven.apache.org/
- Maven search http://search.maven.org/
- Maven Repository Search https://mvnrepository.com/
- SLF4J https://www.slf4j.org/
- Logback https://logback.qos.ch/
- Spark - A micro framework http://sparkjava.com/
- Lombok https://projectlombok.org/
- JUnit5 http://junit.org/junit5/
- SubEtha SMTP https://github.com/voodoodyne/subethasmtp
- SubEtha SMTP Wiser https://github.com/voodoodyne/subethasmtp/blob/master/Wiser.md
- Bootstrap http://getbootstrap.com/
- Electron Build cross platform desktop apps with JavaScript, HTML, and CSS https://electron.atom.io/
- Manifesto for Agile Software Development http://agilemanifesto.org/
- The Twelve-Factor App https://12factor.net/
- The Twelve-Factor App https://12factor.net/ja/
- Freely available programming books https://github.com/vhf/free-programming-books
- ThoughtWorkd TECHNOLOGY RADAR https://www.thoughtworks.com/radar/a-z (Adopt > Trial > Assess > Hold)
- Chef Style DevOps Kung fu https://github.com/chef/devops-kungfu
- The Reactive Manifesto http://www.reactivemanifesto.org/
- リアクティブ宣言 http://www.reactivemanifesto.org/ja
- ドットインストール https://dotinstall.com
- udemy https://www.udemy.com/
- Progate https://prog-8.com/
- Google のデジタル ワークショップ https://learndigital.withgoogle.com/digitalworkshop-jp
- AWS Training and Certification Portal https://www.aws.training/