Gumroad - An all-in-one solution to sell your work and grow your audience.

Optmyzr - Optmyzr AdWords Tools. Optimization Solutions, Quality Score Tracker, Landing Page Checker, and more. Free Trial Available.

Payhip - Sell digital downloads, courses, coaching, and more from one simple platform.

LiveIntent - LiveIntent is a web platform that offers effective e-mail advertising services for marketers and publishers.

Sellfy - Sellfy is an easy to use but powerful e-commerce platform where you can sell digital, print on demand or subscription products. Use a Sellfy storefront to create a beautiful online store or embed a Sellfy shopping cart to your own website.

Affise - Affise offers performance marketing solution to manage and analyze affiliates, advertisers, creatives, conversions, offers, and payments.