I type a lot of css, so I bought a Korg NanoKontrol 2 and built this lovely Atom package. Each column of buttons controls the values of one css property, and each slider sets the px/percent/... values. Ordinary snippets are outdated, go midi snippets!
This usb midi controller is costless and very complete for its size. I bought a used one for 20€ ($25).
You can have a look at lib/actions.js for a complete list of features.
PS: Most of the snippets only works with some popular PostCSS plugins, you can check my list on my personnal front-end framework.
With some helpers:
Good catch. Let us know what about this package looks wrong to you, and we'll investigate right away.