Popular Site with Drag and Drop Columns
We are considering implementing drag and drop table columns, but we would like to see a popular website with the functionality.  Some argue that drag and drop columns would be for advanced users only.

What are some popular websites that utilize drag and drop columns?
Popular Site with Drag and Drop Columns
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We are considering implementing drag and drop table columns, but we would like to see a popular website with the functionality.  Some argue that drag and drop columns would be for advanced users only.

What are some popular websites that utilize drag and drop columns?