Photo Viewer 0.2.5
An image/GIF viewer that can apply various resizing and color effects.
Tenpi software
DlSoftware247 lists 3 Windows programs by Tenpi, mostly Photography, Audio, Graphic & Design software. The most popular are Photo Viewer, Music Player, Waifu2x GUI.
Music Player 0.3.1
A music player with real-time pitch shifting, reversing, and time stretching
Waifu2x GUI 0.5.1
A GUI app that upscales anime-styled images with waifu2x