Butter Sketch Plugin
Butter will butt your layers together.
The plugin fills the gap between the "Align" tool and the "Distribute" tool. Instead of aligning to a single axis or distributing the objects evenly, I wanted to butt objects together, removing any whitespace or overlaps between them.
Butt selection command
NEW Space selection command
Configure Shortcuts
You can configure your own shortcuts in the normal way under Apple > Preferences > Keyboard > Shortcuts. Tutorial.