Apps similar to Triangle Pixel Pusher include Hexels. It's paid, but Grid Paint and TriangleDraw are free. Other options are Isometric and IsoSketch. In total there are five apps like Triangle Pixel Pusher for iPad, iPhone, Mac, Windows and the web.
Marmoset Hexels™ is a grid-based painting tool for vector art, pixel art, design, and animation. A geometric canvas grid lets artists create complex pixel and vector designs with the stroke of a brush.
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Grid Paint is an online drawing tool using various types of grids (squared, triangular, hexagonal). Drawing by grids is something like pixel art, but in pixel art you have only square pixels. Here you have also triangular or hexagonal pixels.
Unleash your inner gridded side by effortlessly drawing on an angled isometric grid, creating beautifully precise geometric artwork. IsoSketch is simple and a blast to use. Yet you have full control with color, opacity, fills, strokes, layers, background images, and much more.
