Spring-practice is a project mainly written in Java, it's free.
Sample scenarios and small projects to learn and practice Spring Framework core part and eco system projects like Spring Batch
Showcases and code samples around the Spring Framework and Spring eco system projects.
Parent project with maven project dependencies
Short code samples to explain Spring Framework features. For more information look at the docs section of spring-practice-snippets and the descriptions published on http://develop.nydi.ch
General docs and informations