Interact.js : Javascript drag and drop, resizing and gestures Library

Interact.js is a powerful, flexible, snappable drag and drop, resizing and multi-touch gestures for modern browsers (and also IE8+) javascript library.

Features:

• 
  snapping
  
  to a grid, custom anchors or paths.
• cross browser and device, supporting {Chrome,Firefox,Opera}’ ‘{
  
  mobile,desktop
  
  }’, ‘ and
  
  Internet Explorer 8+
  
• interaction with
  
  SVG
  
  elements
• being
  
  standalone
  
  (not
  
  yet another
  
  jQuery plugin)
• introducing
  
  0 additional DOM elements
  
• having(a).
  
  fluent
  
  ().interface
• 
  not modifying anything
  
  it doesn’t own (except to support IE8 and to change the cursor (but you can disable that))

Demos :

Demo 1


Demo 2


Demo 3


Demo 4