handsontable for seed data
npm:
npm install seedsontable
node.js:
var seedsontable = require('seedsontable');
var Seedsontable = seedsontable.Seedsontable;
var SeedsonData = seedsontable.SeedsonData;
browser:
<script src="seedsontable.js"></script>
var Seedsontable = seedsontable.Seedsontable;
var SeedsonData = seedsontable.SeedsonData;
This is released under MIT License.