The Addon Manager shows a detailed list of all addons (plugins, behaviors, effects and themes) available in Construct 3. It can be opened via Menu►View►Addon Manager.
By default built-in addons are included in the list. Third-party addons appear at the top so you can easily see what you have installed. You can also uncheck Show built-in in the toolbar to reduce the list to only your installed addons. The search field also allows filtering the list to help you find an addon.
You can find a list of third-party addons on the Addon section of the website, including some additional official addons such as Steamworks for Steam integration. See Installing third-party addons for more information about how to install and uninstall additional addons.
The Addon Manager can also identify if updates for any installed addons are available. This is enabled by default according to the Check for updates for installed addons setting in the Settings dialog. If any updates are detected, it will show a notification when the editor starts up. Addons with updates available can be found by checking Show updates only. Addons can be updated individually by right-clicking on them, or you can install all available updates with the Update all button.
Third-party addons can be bundled with projects Paid plans only, so you don't need to install all the addons it uses when moving to a different system. For more information, see the Bundle addons project property.