From Microsoft Teams, you can access almost every resource from apps to data.
SharePoint: Open Teams and go to the Channel of a Team to find the Files tab, which is a reflection of the Channel’s folder, which resides within that Team’s SharePoint document library.
OneDrive: While in a private chat, share a document with a colleague. When you do, then that document stays in your OneDrive with sharing permissions for the colleague.
PowerApps: Create a PowerApps app for your mobile team to input data. View that app and its corresponding data on the web, within the mobile PowerApps app, or within a Teams tab as a connected app.
Kaizala: Very soon, we’ll see Kaizala as a new addition to Teams. The two will interop especially in terms of chat messages.
OneNote: The digital filing cabinet, OneNote, can also become an app for collaboration, especially when OneNote is added to a tab within a Teams Channel.
Flow: Microsoft Flow creates workflows that automate repetitive work tasks triggered by your Microsoft Teams data.
Planner: Work on your task-related project from within Teams or in Planner on the web, remove or delete your plan, and get notified in Teams when a task is assigned to you in Planner.