AmericanBibleSociety

If you are doing screen design with clients or a team I can't recommend Figma enough. It has really changed the way we work together. Yes, Illustrator still has really nice vector creation tools but we've totally removed it from our daily workflow.

[$$$ Pay Per Test] We've recently used UserTesting to get quick feedback on a completely new UI for bibles.org. UserTesting

The most useful screensharing and voice collaboration tool on our machines. It makes sharing what you are working on at the moment very easy. Screenhero

We employ HockeyApp to test new builds for our mobile applications. It makes it very easy to send out early builds for stakeholders to test. HockeyApp