SPICE Application Notes and White Papers
From LTwiki-Wiki for LTspice
How to Quickly Obtain Spice Parameters for Diodes
Leakage Inductance from Wikipedia
Microsim Application Notes (over 300 pages of SPICE modeling information)
SPICE modeling for diodes from allaboutcircuits.com
Power Electronics
Battery Model for Lead Acid Batteries
Improved Spice Models of Aluminum Electrolytic Capacitors for Inverter Applications
Simulate adaptive switching regulators using PSpice
Designing a (Single Ended Primary Inductance Converter) SEPIC Converter