I'm currently using https://hexo.io/. Like it, node.js and blog aware. I am thinking of messing around with http://harpjs.com/ using https://github.com/superhighfives/harp-gulp-browsersync-boilerplate.

I've only tinkered with Webhook and was extremely impressed. Surprised this platform isn't more popular.

• How We Got to Now — Steven Johnson
• The Innovators — Walter Isaacson

True, it is nice that Prepros is available for OSX, Windows, and Linux.

Link in headline doesn't seem to work: https://gist.github.com/addyosmani/fd3999ea7fce242756b1

• RSS - Reeder
• Pinboard - Pinner
• Reddit - Alien Blue
• DN, HN and Product Hunt - The News
• Read Later - Instapaper
• News nearby - Breaking News
• Twitter - Tweetbot
• Game - Monument Valley
• Podcasts - Overcast
• Music Creation - Figure
• Photography - VSCOcam
• Passwords - 1Password
• Soccer - Onefootball

Personally, I've been using Sass. I'd argue that once you've learned one preprocessor using a different one just takes a couple minutes of looking over the documentation. LESS is considered one of the easier ones to setup though, which may be a deciding factor for you. I suggest trying them all out using something like http://codepen.io/

Another thing to keep in mind is that if you are a Bootstrap user that you can use either LESS and now officially, Sass. Foundation is still Sass only.