Blog2Social - Auto post, cross post, re publish, re post and schedule your WordPress blogs posts to social networks like Facebook, Twitter, LinkedIn, Instagram, Pinterest
Transactional Email Templates by Postmark - Open source email templates for use in your SaaS app.
Facebook Apps and Tabs - Customize your Facebook page with a variety of tabs, apps and design elements. Optimize your Facebook presence with Facebook Apps.
Smart Templates by Sarbacane - Get customized email marketing templates from a URL 💌
Jooicer - Superpowers to boost your Twitter Growth
MJML - The open source framework for responsive emails