We already have places to collect these extensions:

* http://semantic-mediawiki.org/wiki/Help:SMW_extensions
* https://www.mediawiki.org/wiki/Category:Semantic_MediaWiki_extensions

Note on Semantic Watchlist: it is still in beta, so beware it's not as polished yet as you might like.

> Another useful thing that can be done is hosting such extensions on Gerrit[3] so it could use the i18n
> for free and get more developers' attention as well.

Definitely! :) The Semantic Extra Special Properties extension you linked is a good candidate for moving to the WMF repos.


Jeroen De Dauw
Don't panic. Don't be evil.