The %QRCODE{}% variable is handled by the QRCodePlugin
%QRCODE{ "..." ... }%
"..." - text to encode as QR Code.
ecc="..." - error Correction Capability. Valid values "L", "M", "Q", "H". Default "M".
version="..." - symbol version of QR Code, or size of matrix. Valid values "1" ... "40", and "auto" for automatic versioning. Default "8".
size="..." - module size, e.g. pixel size of a block (bit) that makes up the matrix of the barcode. Default "4".
format="..." - format of HTML img tag of generated QR Code image. Supported variables: $urlpath - URL path of image, $width - image width, $height - image height. Default: "<img src='$urlpath' width='$width' height='$height' border='0' alt='' />".
%QRCODE{ "http://twiki.org/" version="2" size="3" }% returns above QR Code.
%SHAREME{}% variable is handled by the ShareMePlugin. Many social media sites are defined in the plugin topic.
%SHAREME% or %SHAREME{"site1, site2"}%
%SHAREME% shows the default icon set
%SHAREME{"Delicious, Facebook, Twitter"}% shows icons to share the current TWiki topic at Delicious, Facebook and Twitter