I made a plugin for Maya that snaps all selected verts to the grid (a feature surprisingly missing from Maya)! When I make my lowpoly pixel art models, having the mesh perfectly aligned to the grid is how I achieve my pixel-perfect UVs, so this tool should come in handy!

You can download it for free on my Store page here on ArtStation if you like: https://www.artstation.com/a/27825164