So you've come here as yet another desperate software developer hungry to find some inputs to get back into brain-processing? Well I may have some starting points for you.
If - on the other side - you're one of the real pro's and stumbled in by accident and you wonder: why the heck is this missing?! Feel welcome and let me know, so I can add it to the page.
Have fun 
Topics
Application Bootstrapping (Quick Start)
- Spring Intializr
- yeoman.io
- contains node.js based generators to kickstart a project.
- hipster.tech
- ratpack.io
- code.quarkus.io
- micronaut.io/launch
Process, Methods
- The agile manifesto
if you work with agile methods, scrum or something similar, you should have read this at least once - Project Cartoon
You need to know this.
Random Libraries
- Connection Pools
- In-Memory Data Grid
- Compression
Cloud
- https://devstats.cncf.io/
the tools in the cloud native computing foundation, their activity and maturity
Template Engines
- Thymeleaf
Java library with an optional Spring MVC module. - Apache Velocity
- Closure Tools (SOY Templates)
Server and client side template engine. Also used in Confluence Plugins.
PDF / Word generation
- Aspose Libraries
creating word and excel fiels with Java.