Please refer to
Add-ons
to enable external services.
Cloud Storage (public)
Amazon S3
Azure Blob Storage
Box
Dropbox
Google Drive
One Drive
Cloud Storage (private, on premise)
S3 Compatible Storage
Nextcloud
OpenStack Swift
ownCloud
Source Code Repositories
GitHub
GitLab
Bitbucket
Figure and Table Sharing Service
figshare
Reference Management
Mendeley
Zotero
Linking to Repositories
Dataverse