H A N D Z - Free 3D illustrations of diverse hands gestures
MJML - The open source framework for responsive emails
Characterz - Biggest diverse mix and match 3D illustration library
Stripo - Stripo is an all-in-one email design platform. We enable our clients to build emails of any complexity, including interactive AMP emails, really fast and easy.
Khagwal 3D Illustration Library - Free 3D illustration library for web & mobile app designers
Templates by Email Monster - Hundreds of free, responsive email templates. Pick and edit.