We recently started to re-create our Office 365/SharePoint Online web parts using the new Microsoft SharePoint SPFx Framework which is the recommended and future-proof way to create web parts for Office 365. These web parts can be placed both onto modern and classic pages.
The below web parts are already available in the new format and we'll continuously add more web parts in the course of the next weeks and months:

More infos: Office 365 Web Parts

Author: Site Admin