Nice list. The PDF ticket and badge generation part is especially useful for WordPress event websites.

One related area is PDF searchability. Event sites often collect many PDFs — tickets, badges, schedules, brochures, certificates, or guides. If those documents are searchable inside WordPress, it becomes easier for visitors and admins to find the right information later.

We’re working on that problem with WebEquipe PDF Search, especially for text-based PDFs and scanned PDFs with OCR.