From W3C Wiki
04/16/2012 (Rich Boyce): Did a search over twitter for #hcsltools and got no results.
04/16/2012 (Rich Boyce): Would like to add a "+1" button that targets the URL of each tool (for example, by adding the JS generated here: http://www.google.com/webmasters/+1/button/). This might be possible using MediaWiki, but there does not appear to be an extension that allows <script> tags to be embedded in Wiki pages. There is an extension for "+1" here <http://www.mediawiki.org/wiki/Extension:Google_%2B1> but it uses a fixed URL that would be specific to the W3C server rather than the tool.