Khan Academy on a Stick
Differential equations
Topics covered in a first year course in differential equations. Need to understand basic differentiation and integration from Calculus playlist before starting here.

First order differential equations
(13 videos)
Differential equations with only first derivatives.

Second order linear equations
(13 videos)
Linear differential equations that contain second derivatives

Laplace transform
(20 videos)
Transforms and the Laplace transform in particular. Convolution integrals.