Bundle of Holding - Adventurer Conquerer King System - ACKS Collection
I can't believe I would have missed. this if it hadn't been pointed out in a comment on the previous post. I used to check the Bundle of Holding site every few days but I've gotten lazy. In any case...
ACKS is a great system, kinda like Labyrinth Lord with racial classes (note, I didn't say Race as Class - there is a difference and ACKS handles it well) Then you have the ACKS Player's Companion. You want a set of rules, charts, costs and balance checks to create new classes for the OSR game of your choice? This is the book for you.
Looking to handle larger combats or military actions? Check out the Domains of War books. Lairs & Encounters is practically worth the price of admission to the Bonus Collection (currently just under $20) on its own. Don't forget Dwimmermount. Even if you don't run it as is there's simply a huge amount of material to mine.
I strongly suggest the Bonus Collection if you can afford it.
You have just over 17 days to close the deal, but don't wait too long... you might forget ;)
The Minotaur for Old-School Essentials
*Requirements:* Minimum STR 9, Minimum CON 9
*Prime Requisite:* STR and CON
*Hit Dice:* 1d10
*Maximum Level:* 8
*Armor:* Leather, including shield...