My Desmos Delights (submit your own @ bit.ly/DesmosDelights) Please add to the list.
Number Sense
(Ir)rational Number Line
Factors (via @lukeselfwalker)
Double Number Line
Functions
Linear
Match My Line (via @mjfenton)
Slope Steps
Quadratics
Match My Parabola Lesson (via @mjfenton)
Explore Standard form b and c
Explore Standard form a,b,c
Explore Standard form a,b,c (with notes)
Quadratic Multiple Forms
Complex Roots of Quadratic (via @314piman)
More Polynomials
Polynomial Parent Function y=a(x-h)n+k
Trigonometry
SSA Ambiguous Case (via @lukeselfwalker)
Trig Identities on the Unit Circle (via @lukeselfwalker)
Unit Circle with XY Plots (adapted from @jkindred13)
Systems of Expressions
Absolute Value vs Constant a|x-h|+k [?] c
Linear Vs Constant ax+b [?] c
Linear Vs Linear ax+b [?] cx+d
Quadratic Vs Constant a(x-h)2+k [?] c
Cubic Vs Constant (x-h1)(x-h2)(x-h3)+k [?] d
Coordinate Geometry
Physics
Running Man
Work and Force Ramp
Ping Pong Quadratic Catapult Activity
Statistics and Data
Transformulas 