# Outreach client extensions overview

Following extensions are currently available:

- [Web-widget extensions](/client-extensions/web-widget-extensions) - allow you to display content of a web widget inside the Outreach client application
  - [Shell extension](/client-extensions/web-widget-extensions#shell-extension) - launches your widget as a full-page application embedded into Outreach.
  - [Tab extension](/client-extensions/web-widget-extensions#tab-extension) - adds a custom tab with your widget to the Prospect/Opportunity/Account detail page.
  - [Tile extension](/client-extensions/web-widget-extensions#tile-extension) - adds a new tile containing your widget. The end user may choose to place your tile
on their Prospect/Account overview pages.
- [Text editor extension](/client-extensions/text-editor-extension) - adds a new button to the Outreach' built-in text editor that
launches your widget. The widget is expected to return HTML content to be injected into the message.
- [Activity feed custom events](/client-extensions/activity-feed-custom-events) - allows you to send a custom event into prospect activity feed.
- [Mailing link custom tracker](/client-extensions/mailing-links-custom-tracker) - allows you to replace the embedded links in Outreach mailings with custom tracking URLs.