Marvel (Comics) API - Create awesome stuff with the world's greatest comic API
Maileroo - Maileroo is a powerful email delivery platform, featuring a user-friendly SMTP service and Email API. It specializes in supporting transactional emails with advanced features like delivery tracking, as well as detailed open and click monitoring.
DC Universe - The DC Comics streaming service w/ original content
Postmark Express - What happens to your emails after you hit the "send" button?
Comixology Unlimited - Netflix for comics and graphics novels by Amazon
Tab Tosser - Automatically close tabs you have ignored for too long