Making Trees From Twist Ties

Creative Twilight has a nice tutorial on making trees from twist ties and joint compound.

Pocket Tactics 3D Printer Game

Pocket Tactics is a free download and print on your 3D printer game.

I think this is the wave of the future.

Wayfarer Tactics Universal Rules

Wayfarer Tactics is a free wargames rules designed to be universal in both setting and scope. The authors write:

Welcome to Wayfarer Tactics, the dynamic miniature wargaming system that puts the whole of the Multiverse under your control!

Using the simple dice mechanic of Pocket-Tactics, you may enact epic battles using whatever models you have on hand (in any scale). You’ll also need a deck of standard playing cards to give your characters orders and activate certain special abilities. Whether you want to play free-range skirmishes in dense terrain, massive squadron battles measured by the yard, grid-based dungeon crawls, or anything else, the modular core rules will adapt to your needs. It can even be played as an RPG!

Beyond The Gates of Antares Quick Start Rules

Warlord Games offers a set of free quick start rules for their science fiction small unit game, Beyond the Gates of Antares.

Japanese Clan Wars Rules

An Honorable Victory is a set of free wargames rules for battles set in Japan’s 15th and 16th century clan wars. The author writes:

 

An Honourable Victory! are an abstract (but not too abstract) set of rules designed for the table-top wargaming of the Clan Wars of Japan during the 15th and 16th centuries.

After one or two games you’ll have them down pat.