The best alternatives to Sketch Isometric Plugin are Sketch, Tabbied, and Slantt. If these 3 options don't work for you, we've listed a few more alternatives below.
Create and customize minimally generated patterns or artwork to use for wall art, background images, print and other projects. Download your high-resolution art for free. Start making your art at https://tabbied.com
Slantt is a tool for creating tiled isometric graphics. ✓ Drag & drop image tiles ✓ Turn them into 3D boxes ✓ Set elevation for shadows, box thickness and camera angles ✓ Custom background gradient ✓ Export to PNG or SVG
The Handy Menu allows designers to create collections of plugins and displays them in contextual menus. Also it is possible to assign a hotkey to each menu.