An excellent resource from University of Central Florida is the Blended Learning Toolkit website. It provides strategies and tools for developing, implementing and evaluating blended courses. Applicable to higher education and K-12.
The site, Blended Universe, provides in-depth knowledge, skill building and visual strategies for blended learning via articles, videos and more. It covers the seven models of blended learning brilliantly. The site goes beyond the "technology", and addresses the pedagogy of blended instruction.
Platforms and Apps
At TEDEd, educators can create customized lessons with YouTube using a bank of resources that include animations, videos, and more.
ShowMe is an iPad app for teachers and students, that allows users to create and share tutorials and lessons.