This video on adding snow, ice and sludge to your wargaming terrain. Useful stuff for the currently popular Frostgrave rules.
Battleground Hostile Intentions Board Game
Battleground Hostile Intentions is a free board game for two players. The author writes:
It is the near future. A rebel coup has destabilized a small corner of the world, and border nations are moving in to grab whatever territory they can.
You command the forces of one of those nations. You have established a command center in a section of the country, but you face rivals for control of the area. Now you must build up your command center by erecting defenses and constructing facilities that train soldiers, manufacture weapons, tanks, aircraft and other vehicles.
Achieve victory by destroying your opponents’ command centers or capturing and holding critical objectives located throughout the area.
Company Leader Boardgame
Company Leader is a free print-and-play boardgame about modern combat. The authors write:
Company Leader is a free wargame for 2 to 4 players. It is a company level based game, meaning that players are playing with company sized playing pieces. As a commanding officer you try to win the battlefield by scouting and destroying the enemy and by capturing urban areas.
Making Terrain Boards
The 1000 Foot General has a series of articles on making terrain boards.