When you're building out your experience in Disco we want you to have full control of what apps your members are using. We have experience templates that already have certain apps in them or you can start with a blank template and add just the ones you'd like to use.
These are the app options in Disco to add to your left navigation bar in an experience. Below each you will see a description of what it does:
You'll also see there are Integrations & Embeds. You can find out more information about them here.