Here are the Extension for mediawiki which I developed or edited.

Special:DeleteOldRevisions is not my Extension. All credit goes to Marc Noirot and Gunter Schmidt. They haven't fixed this extension for 1.5 years, there are no contacts, and I decided to take supervision, fixed recent bugs and released it under the name "Special:DeleteOldRevisions2".

As you can guess from title, it deletes all old revisions of pages. Don't wanna store so much trash in your database, yeah?

Currently, it should work perfectly for mediawiki v 1.13.2, which I use.

Original Special:DeleteOldRevisions on mediawiki.
Blog entry for Special:DeleteOldRevisions2.
Download Special:DeleteOldRevisions2.
Special:DeleteOldRevisions2 mediawiki page.

Special:GoogleSitemap is also not my Extension. All credit goes to Francois Boutines-Vignard, who also abandoned his code.

I also took supervision, fixed recent bugs and released it under name "ManualSitemap", since not only google supports sitemaps.
Normally, you should use built-in wiki console sitemap generator, but it's rarely possibly because of security settings. That plugin works in almost any cruimstances, even under safe mode.

I added the following features:

• You don't need to store part of extension in special/includes any more, all is in one extension folder
• You can set option to notify all systems you want about the changes in your sitemap. For example, for google:
  $ManualSitemap_Notify[]='http://www.google.com/webmasters/sitemaps/ping?sitemap=http://jehy.ru/wiki/sitemap.xml';
• You can exclude images from sitemap index by setting
  $ManualSitemap_ExcludeImages=1;

Original Google_Sitemap on mediawiki.
Blog entry for Special:ManualSitemap.
Download Special:ManualSitemap.
Special:ManualSitemap mediawiki page.

Adds <metakeywords/> tag to wiki. There you can specify keywords for current page. Of cause, there are are many solutions, but I just didn't like their syntax.

Thanks to MetaDescriptionTag Extension (Joshua C. Lerner) for good code example.

Blog entry for Yet Another Keywords.
Download Yet Another Keywords.
Yet Another Keywords mediawiki page.

Simply adds <lj user=""/> and <lj community=""/> tags to your wiki.
There are two variants of working of this Extension: the one which completely repeats original livejournal link, and the one which works more according to wiki engine.

• First variant

It replaces quite like with livejournal, and gets little icons from livejournal server. But usually we don't want to load any images from remote server, right?


• Second variant

Uses icons which YOU upload to wiki. Unfortunately, it means that icon can't link to user profile (stupid wiki engine doesn't allow images with links. Seems like it will apperar in mediawiki 1.14... Possibly).

To switch between them, you just need to set variable to 1 or to 0.

Livejournal User Blog entry.
Download Livejournal User.
Livejournal User mediawiki page.