The QR Code Block module provides a block that contains a QR code to render the URL of current page which vistor is accessing, and an image can be placed into the middle of the QR Code.
This module provides Views fields which display entity fields without entity loading and, optionally, without standard logic of field formatter processing.
There are certainly many charting modules available, including ones also implementing the Highcharts library. However as far as the maintainers*) are aware, this is the only one that also takes advantage of the special functionality of the HighchartTable jQuery library.
That makes this module unique for the following reasons:
You can insert a chart above any numeric HTML table on any page with a single click. Whether the table was embedded into normal content using a WYSIWYG editor (CKeditor perhaps), produced by a Views plugin, a Webform results summary, it doesn't matter.