Gala event management apps?

I'd love to hear from any orgs using a third-party event management app to manage any part of your seated fundraising events.

We currently sell tickets/tables to our fundraisers using Eventbrite*, manage seating assignments and RSVP lists in an end-of-life event mgmt application (AuctionTracker), and track revenue and generate receipts out of Tessitura. I suspect you have some super ideas about alternative ways we can approach this and I'd be grateful to hear them. 

* 1) API limitations around elevated events 2)  internal business rules/constraints related to leveraging 'performance' model for our gala events.

Thanks so much for sharing!