This web site is the official market place to find Dolibarr ERP/CRM modules or addons.
You can search new features and find modules or miscellaneous addons. Browse into categories to find your plugin or use the search form at the top...
Most plugins/addons are free, some need fees (Members of the Dolibarr foundation can have a 20% discount if asked to the foundation once the DoliStore account has been created and BEFORE buying anything).
You can submit your modules with price of your choice (or free of charge). For this, all you have to do is create an account on DoliStore and submit your plugin, modules or document.