Giftcard Zen - Buy a gift card at a discount
Marketo - Marketo's powerful marketing automation software helps marketers master the art & science of digital marketing to engage customers and prospects.
Wirize - Payment checkout for freelancers
Omnisend - Omnisend - Marketing Automation for Ecommerce provides the omnichannel approach for sales-driven marketers that have outgrown the generic email marketing platforms.
Google Payment API - Enable an easy-to-use checkout experience for customers
Constant Contact - Constant Contact offers email marketing, social media marketing, online survey, event marketing, digital storefronts, and local deals tools.