I have created a responsive version of gridster using bootstrap, much like this, for the interested sould. For the interested souls: http://ncthis.github.io/gridster-bootstrap/
Gridster is the most popular and current ruler of the "market." We went back and forth quite a bit with this -- meaning that I had to convince the stakeholders twice before being able to start something in-house :)
The main reason we couldn't use gridster was because it's vertical and we wanted a horizontal grid, and that gridster is not very maintained any more (you can read their README.) There are some notable forks, including one here there was an attempt to make the grid work horizontally, but which seemed far from stable and the complexity of the grister code (I read it all) seemed to much of a hustle to contribute (think estimates, etc.) It was definitely the best decision, in the end our GridList lib ended up way lighter than gridster, and we even have a pretty slick collisions implementation (not at all by the book tho, but covering more cases)
There are more small reasons like responsiveness, resizing based on a 1d index, resizing items, etc.