Stripe Revenue Recognition - Stripe Revenue Recognition simplifies accrual accounting so you can close your books quickly and accurately.

Zendesk - Zendesk is a beautiful, lightweight help-desk solution.

Baremetrics Cancellation Insights - Cancellation feedback w/ revenue reports & automated emails

Freshdesk - Freshdesk is a cloud-based customer support software that lets you support customers through traditional channels like phone and email, social channels like Facebook and Twitter, and your own branded community

Revenual - Aggregated sales reports for app makers 💵

HelpScout - Help Scout is a simple, straightforward way to provide excellent support