GM Code or GMcode stands for GreyMatter code. It provides style formatting without HTML tags.
Categories: "by Install type"
This skin tag displays a list of who is online.
All logged in users and guest users who have requested a page in the last 5 minutes are listed.
This skin tag displays a list of post archives.
Archives can be grouped monthly, daily, weekly or post by post.
Ping the b2evolution.net site after your posts
This plugin is no longer maintained.
The third-party service used by plugin has changed its terms and seems to be no longer supported.
More information: http://forums.b2evolution.net/topic-18099#c93463