Trim - Manage and cancel your paid subscriptions
Bobby - Keep track of your subscriptions
Dinero - Dinero is a web based software for accounting, billing and taxes.
Rocket Money - Find your paid subscriptions and cancel with one click
Recurpay - Recurpay is a subscription SaaS app for businesses that automates recurring billing.
Stripe Billing Customer Portal - Stripe-hosted page for customers to manage subscriptions