Plugins are mainly user-contributed add-ons that enhance and extend TWiki features and capabilities. A limited number of plugins are included in the core TWiki distribution - and most those can be removed - while the rest are optional, available from TWiki:Plugins/WebHome.
Here is a list of the plugins currently installed on this TWiki site:
DefaultPlugin: This plugin can be used to specify some simple custom rendering rules. It also renders depreciated *_text_* as bold italic text.
SpreadSheetPlugin: Add spreadsheet calculation like "$SUM( $ABOVE() )" to tables located in GNHLUG topics.
ActionTrackerPlugin: Adds support for action tags in topics, and automatic notification of action statii
AliasPlugin: Define aliases which will be replaced with arbitrary strings automatically
ApprovalPlugin: Plugin to establish complex approval workflows
BlackListPlugin: Utility to keep malicious users away from a public TWiki site
CalendarPlugin: This plugin shows a monthly calendar with highlighted events
ChartPlugin: Create PNG or GIF charts to visualize TWiki tables
CommentPlugin: Allows users to quickly post comments to a page without an edit/preview/save cycle.