The League of Ordinary Gamers has a tutorial on making counters for your games.
Small World Productions has a short tutorial on making rivers for your wargames table.
Munera Sine Missione, Exagoni Libero is a set of free wargames rules for gladiatorial combat. The author writes:
These rules are an adaption of Munera Sine Missione (v2.1) by Alan Saunders, 2002-2012, which were based on “We Who Are About To Die Demand a Recount” by Gary Comardo and published in Issue 67 of “Saga”. The special attacks were chiefly inspired by Chris Peers’s Gladiator combat rules in the Foundry Miniatures Compendium.
Main differences are :-
1. I have adapted the game for those that do not have a hex mat or prefer to play
2. “Strength” renamed “Stamina”.
3. Spear and Lasso ranges increased.
4. I have added the Arbelas, Scissor and Murmillo as fighter classes. Rules for the
Arbelai and Scissores’s special weapons have been added.
5. Modifiers on AP or Attack roll have been repeated in the weapon descriptions to
speed things up.
6. Rules for the Galerus have been added and changed slightly.
7. An Appendix of “Special Attacks” added and relevant modifiers for Appealing to the Crowd added to that table.
Highest Ground is a free science fantasy board game. The author writes:
The Highest Ground is a game that imagines a world with a very long period variable climate. Where an alien species has, approximately every 800 Earth years, collected a band of warriors from the most advanced warrior state on Earth at the time, and transported them to this planet. There they are to achieve dominance over the local population, grow a crop for the aliens, and, in the ensuing climactic holocaust, be almost wiped out and, therefore, not become a threat to the aliens.
At the time depicted by the game the have just bagged a new group of Earthlings and taken them to the planet. This group
is from 1979 and is a bunch of mercenaries on the losing side of an African civil war. They have been grabbed from a
soon to be terminally untenable position. They have been taken to the planet where the society that has grown up
around the survivors of previous recruiting drives consists of several warring states peopled by Medieval feudal kingdoms and knights, Roman Legions, pony riding barbarians and Egyptian pharaohs. The game finds the few mercenaries, having allied themselves with the European kingdoms, at war with the local Roman Empire.
In "Turkey Hunt," players blast away at velociraptors that have escaped from Jurassic Park.