Barrel Rider Games came out three really handy and cool supplements for White Box Swords & Wizardry. The first thing you should know is that these are for the White Box version of Swords & Wizardry. In a nutshell, this harkens back to the three Little Brown Books in a Little White Box. These are clean simple and to the point PDF’s.

White Box Companion: Adds Bard, Druid, Paladin, Ranger and Thief classes. Remember these aren’t part of the original.
White Box Bestiary: More monsters. Need I say more. Yes, some of them may familiar but still cool.
White Box Treasures: Magical loot! Is there any other reason to go into a dungeon?

Wile some of the material is familiar, it’s good to see another take on an old standard. Heck, that’s one of the keystones to the whole OSR thing (IMHO). The White Box PDF’s very reasonably priced and a good addition to any OSR library. Well, worth a look.