# TWiki Contribs _Reusable code that may be used over several plugins and add-ons._
## Overview TWiki contribs extend the functionality of TWiki, typically used by plugins and add-ons. They may also provide alternative implementations for sections of the TWiki core e.g. user management, or when an extension just can't be implemented as a plugin because it requires very close access to TWiki internals. **_Relevant links on TWiki.org:_** - TWiki:Plugins.ContribPackage - list of all contributed contrib packages - TWiki:Plugins.ContribDevelopment - discussion and feedback on contributed packages - TWiki:Plugins.ContribBrainstorming - open forum for new contrib ideas - TWiki:Plugins.ContribPackageHowTo - instructions and template to create a new contrib package **_See other types of extensions:_** [[TWikiAddOns]], [[TWikiPlugins]], [[TWikiSkins]] ## TWiki Contribs Installed on this TWiki # TWiki Installation Error Incorrect format of searchformat template (missing sections? There should be 4 %SPLIT% tags) ## Installing Contribs - Download an add-on from TWiki:Plugins.ContribPackage. - Follow the installation instructions in the contrib topic. ## Creating new Contribs - Visit TWiki:Plugins.ContribPackageHowTo and follow the instructions. **_Related Topics:_** [[DeveloperDocumentationCategory]], [[AdminDocumentationCategory]], TWiki:TWiki.TWikiPluginsSupplement -- **_Contributors:_** TWiki:Main.PeterThoeny