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

Gemini Photos - Clean up your Camera Roll

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

PickStackr - Organize and manage your camera roll

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

Flic - Flic is a wireless Bluetooth-enabled button that acts as a shortcut to many actions on your wireless phone or other connected device.