All Radiangames titles are at one point (not sure if they still are) are a buck each. Most Donut Games titles are at a buck. Slayin Zombies. Kid Tripp 774 Deaths Rock Runners Miss Claire Garden One Tap Hero I think Anomaly titles were a buck at one point. Each episode of most Telltale titles have dropped down to a buck before. Im pretty sure Ghost Trick's full unlock dropped to a buck once. I dont remember other good titles that went down to a buck at some point.
99 Bricks Wizard Academy I don't know if it's on sale or they permanently lowered the price to get more exposure but it's an outstanding physics puzzler.
Plague Inc. Micromon Slayin The Room Stealth Inc. Neon Shadow Don't Shoot Yourself! Monster Adventures Mikey Shorts Kid Tripp Miss Claire Garden Flick Home Run Ava's Quest HD Kingdom Rush Mirror's Edge Spell Sword Run Roo Run Fruit Ninja Tiny Wings Zenonia 3 That was harder than I thought. Most games I keep on my devices are normally priced above a buck. You could sometimes get them for a dollar or less though like Infinity Blade