Here are a few links to get you started:
Beginner's Guide An introductory guide that shows you how to generate a new ready-to-run Apex application using the maven archetype and a good deal of the application landscape at an introductory level.
Application Development Tutorials
Explore Apache Apex application development with one of the tutorial applications below.
Top N Words is a complete guide to writing your first Apache Apex application using Java or dtAssemble
Sales Dimensions is an introduction to assembling and visualizing sales analytics application with dtAssemble
- Application Development - comprehensive guide to developing Apache Apex applications
- Application Packaging - creating application packages, changing settings, and launching application packages
- Operator Development - creating new operators for Apache Apex applications
- dtGateway REST API - complete listing of all services offered by dtGateway