SPICE and LTspice Courseware and Tutorials
Getting Started
HSPICE Tutorial
Introduction to SPICE
Intro to LTspice with a video
Introduction to SwitcherCAD
LTspice Getting Started Guide from Linear
SPICE 3 User's Manual from University of Exeter
University of Evansville LTspice IV Library and Tutorials
UNIVERSITY of PENNSYLVANIA SPICE overview
Intermediate
Adding MOSFET models
Convert HSpice CMOS Library Files to PSpice CMOS Library Files - Manually
Modeling, Parametrics, Stepping and More
Nonlinear Load-Flow Computation with SPICE LTspice files included
OrCAD PSpice A/D Online Manual
Setting up LTspice and using models from wikiversity
SwitcherCAD III manual from Linear
Tutorial from guitar stompboxes and electronics
Using WAVE files as input/output in LTspice
Using LTspice as a Schematic Capture Tool for FreePCB
College Courses
College course on CMOS Mixed-Signal Design Full course, lectures, problems - LTspice examples included