SPICE and LTspice Courseware and Tutorials
From LTwiki-Wiki for LTspice
Getting Started
Introduction to SPICE
LTspice Getting Started Guide from Linear
Intro to LTspice with a video
Introduction to SwitcherCAD
University of Evansville LTspice IV Library and Tutorials
UNIVERSITY of PENNSYLVANIA SPICE overview
Intermediate
Adding MOSFET models
Modeling, Parametrics, Stepping and More
Tutorial from guitar stompboxes and electronics
Using WAVE files as input/output in LTspice
Using LTspice as a Schematic Capture Tool for FreePCB
Setting up LTspice and using models from wikiversity
SwitcherCAD III manual from Linear
OrCAD PSpice A/D Online Manual
College Courses
College course on CMOS Mixed-Signal Design Full course, lectures, problems - LTspice examples included