Angels 1-5 is a game of air combat over Britain in 1940
Good Little Tricks Print and Play Card Game
Good Little Tricks is a free print and play card game similar to Hearts, where you try to avoid taking cards. It adds a few twists of its own.
Basic Flocking
MiniBlaze has an article on one of the most basic of miniature wargaming activities: flocking your figures’ bases.
Building A 3D Wiz War Gameboard
The Random Thoughts and Senseless Pastimes Blog has an article on building a 3D gameboard for the classic Wiz War game.
Star Breach Sci Fi Rules
Star Breach is a set of science fiction rules that are miniatures agnostic. The free 1st edition core rules are available at the link. There’s also a deluxe version you can buy.