When comparing Skeleton vs ArtDesignUI, the Slant community recommends Skeleton for most people. In the question“What are the best Bootstrap alternatives?” Skeleton is ranked 6th while ArtDesignUI is ranked 9th.
Ranked in these QuestionsQuestion Ranking
Pro Responsive grid
Pro Style agnostic
Pro Vanilla CSS
No bells and whistles for Skeleton, it's just CSS.
Pro Media queries
Pro Support for all major web browsers
This includes IE 7 and its newer versions.
Pro Great technical support available
The ArtDesignUI team offers great technical support to users.
Pro Fully responsive
Pro Class prefix to prevent conflict with classes from other CSS files
Pro Full style control with JS
No need for CSS: width, height, border, icons, colors, etc...
Pro Variety of transition effects
Pro Full control of the position of all elements
Pro Support images with different dimensions
Pro Keys press listening and mouse wheel listening
Pro Full navigation control
Con Not maintained anymore
No active development for two years.
Con Looks terrible
Con Pushes some really awful ideas
Loading splash screens, non-changing URLs because everything's loaded by JS, awful HTML generation from the PHP scripts. It's just a trash fire of bad.
Con Costs €50 - €250
And that's just a year of updates.