RPGNow/DriveThruRPG often has sales, and I don't usually put lists like this today, but I had a couple of people ask for recommendations on what to pick out from the mass of available games. These are my recommendations, in no particular order. There are a lot of games available, and it will take me a while to work through the list, so I will probably update this a couple of times before the sale goes away.
Hubris: A World of Visceral Adventure. Hubris is a really interesting setting for the Dungeon Crawl Classics RPG (also on sale) that is filled with great monsters and a potent Swords & Sorcery vibe. Usable for any OSR game, or D&D-esque system with a little work. If you want a dangerous setting, this is the one for you.
I was really surprised by the Adventures In Middle-Earth Player's Guide. I will admit that I'm not the biggest fan of Tolkien, but this really surprised me. If you want a dark fantasy setting that has the benefit of familiarity to most gamers, Middle-Earth is where you want to go.
NEW is a dice pool-based game of science fiction. Character creation is robust, but quick, and the game is fast-moving. Unlike some other science fiction games, NEW isn't locked into a particular paradigm or style of science fiction. It also has the benefit of being the base for the rules to the upcoming 2000AD/Judge Dredd role-playing game from EN Publishing. I write for EN World, which is run by EN Publishing, so take this recommendation with a grain of salt if you want.
Now, I am the co-publisher at Battlefield Press, so I was involved with the publication of the Ninja High School RPG (I am also working on the upcoming Fate version of the game). But, I would still recommend this game if I wasn't involved with it. Based on the D6 rules originally published by West End Games, the Ninja High School game is a pretty light game itself. This is probably one of the better uses of the D6 rules that I have seen in a long while.
Delta Green is back! Delta Green is a modern espionage role-playing game powered by the Basic Role-Playing engine. Spies and soldiers attempt to hold back the tide of encroachment of the Cthulhu Mythos. I played in this setting a lot when it was "just" a supplement for the Call of Cthulhu RPG. This game is the King (in Yellow) of Cthulhu Role-Playing games.
Colonial Gothic is a horror role-playing game set around the time of the founding of America. Fans of historical settings and horror should check this game out. The system is a unique one, and robust.
As long as I am talking about horror games, be sure to check out the third edition of the classic horror role-playing game Chill. Chill Third Edition is a game of investigative horror and monster hunting. If you're looking for something where the heroes have a bit more of a chance than they might in a more Lovecraftian RPG, you should check out Chill.
Theorems and Thaumaturgy is one of the best third party OSR magic supplements that you will find. I might be slightly biased because the author took a couple of suggestions that I made in putting this expanded second edition together. There are new spells and spellcaster classes designed for Labyrinth Lord, but usable in any OSR game.
Based on the Swords & Wizardry rules (my preferred OSR ruleset), Crypts and Things is a very British take on the old school system. If you were a fan of Warhammer Roleplay, or Games Workshop's old White Dwarf magazine, you'll enjoy Crypts and Things.
I've been a booster of the Hydra Collective designers for a while. If you want some imaginative and psychedelic adventures for your old school fantasy games, you really need to have the modules of the Slumbering Ursine Dunes trilogy: Slumbering Ursine Dunes, Fever-Dreaming Marlinko and Misty Isles of the Eld. Chris Kutalik is one of the most inventive adventure writers in the old school movement currently, and these modules will thrill and freak out your players as they come to terms with the psychedelic fantasy world that he has created.
Inspired by the B/X edition of Dungeons & Dragons and more contemporary games like Dungeon World, The Nightmares Underneath is a "traditional" role-playing game with an nontraditional approach. If you've played classic editions of D&D you'll have this game down in no time at all. The setting of the game uses the inspirations of the Middle East and Northern Africa in its world building.
There's plenty of other games that are available in the sale, but these are some of the ones that I am familiar with. Any of these are worth having on your virtual gaming bookshelves. The sale ends March 13, 2017, so be sure to check it out before then.