Lago Billing - Open-source alternative to Stripe Billing and Chargebee

Birch - Find the best credit card for your spending.

Metronome - Metronome helps software companies launch, iterate, and scale their usage-based business models, with billing infrastructure that works at any size and stage.

The Roll by EyeEm - Organize your iOS Photos automatically

Chargebee - Chargebee lets you manage subscriptions and payments at scale, handle custom recurring billing scenarios, reduce subscription churn and simplify accounting.

Cleanz - Simple and beautiful way to clean up your photo library