Mobtest

for source control and issue management we use Github. We use git as well to push code out to Heroku GitHub

our main database is a MySQL RDS instance with. Schema changes are managed by rails migrations Amazon RDS

iOS and Android apps are stored in S3, as well as icons that we extract out of the binaries Amazon S3

All our transactional emails go via Sendgrid, so account created, test started, test finished etc. SendGrid