Question
My background is web development I know I can assemble a solution (i.e. WordPress / Gravity Forms / Stripe, etc) yet I want to go for simplicity / practicality and, ideally, point the organizers to a solution that offers additional value (time tracking integration, perhaps, etc).
I'm considering EventBrite as a baseline.
Answer
Definitely http://www.webconnex.com. Straightforward fees, and they have a product just for this. The founders are also great guys!
Their clients range from Google, to Red Bull, small non-profits, to 5k races.
