Vexillia has painting guides for the Thirty Years War in both pdf and epub formats.
Agent Decker is a spy-themed solo deckbuilding game.
The author writes:
AGENT DECKER is a mission-based deckbuilding game for one player where you'll acquire gear and skills by facing obstacles. The alarm raises every turn, so you must pick who you take out. Do you go for the cool weapon, or take out the security camera?
The download includes the print-ready cards and the rulebook for Agent Decker version 0001.
Macrocosm has a new line of science fiction miniatures -- and a free rules set. From their website:
Macrocosm is a 28mm Sci-Fi Skirmish game set in a future galaxy of excitement, rayguns, weird aliens and wonder.
Players take on the role of a group of adventurers and explorers, represented by a group of miniatures, where they play out scenarios and campaigns to determine the fate of the colonies and to further the glory of their chosen faction… and of course… to have fun!
Adeptus Painter has a photo tutorial on how to make the most of your true metallic silver paints. He suggests that it is easier to shade metallic paints than to highlight them.
Wargames Research Group has a page with lots of their older sets available, including the Fifth Edition Ancients, which were the standard for many years.