Computing
LilyPad Arduino - Tutorials on how to use the LilyPad Arduino to build your own soft circuits and interactive fashion

BlinkM - Programmable LED that you program via a software interface to be any color, and blink and fade in virtually any pattern.

Smart LED Tutorial - Great tutorial on how to create your own programmable LED.

Sensors

Touch Sensor — A simple touch sensor using conductive thread and fabric with analog pin

Zipper Sensor - An exploration on how to transform a zipper using conductive thread and resistors into an analog and digital sensor.

Fabric Bend Sensor - Using conductive thread, Velostat and neoprene, sew your own fabric bend sensor.

Flexible Fabric Pressure Sensor - Sew together conductive fabric and anti-static plastic to make your own fabric pressure sensor!

Fabric Button—Great tutorial on how to create a fabric button using conductive fabric and foam.

Fabric Battery Pouch - Great tutorial on how to make a soft battery holder

Sewing
Basics of Sewing - Basic to Intermediate lessons from machine and hand stitching techniques to bias basics.
Smart Materials
EL Wire — Great tutorial on how to use EL Wire to make wearables

Soft Circuit Projects

LED Ornament Tutorial — Template download for Dove ornament. Online tutorial can be found here.

Four Cell Soft Battery Holder - Tutorial on how to create a soft coin cell battery holder

Electronic Embroidery — Fun tutorial that combines embroidery with circuitry