LucidChart - LucidChart is the missing link in online productivity suites. LucidChart allows users to create, collaborate on, and publish attractive flowcharts and other diagrams from a web browser.
H A N D Z - Free 3D illustrations of diverse hands gestures
draw.io - Online diagramming application
Characterz - Biggest diverse mix and match 3D illustration library
yEd - yEd is a free desktop application to quickly create, import, edit, and automatically arrange diagrams. It runs on Windows, Mac OS X, and Unix/Linux.
Khagwal 3D Illustration Library - Free 3D illustration library for web & mobile app designers