Java and Greasemonkey.
What else does a man need?

Well there's of course:

• Lucene/Solr
  
• Tomcat
  
• Also lately getting interested in large data set technologies
  These are the technologies I use the most for my personal projects and my work and will focus on related questions.

Scrap that! Stable Diffusion, LLMs, and AI is the new black.