There are 2 repositories under wopi topic.
Read-only Mirror - no pull request (use https://gerrit.libreoffice.org instead)
ASP.NET Core MVC implementation of the WOPI protocol. Enables integration with WOPI clients such as Office Online Server.
A vendor-neutral application gateway compatible with the WOPI specifications.
A standard and framework agnostic PHP library to facilitate the implementation of the WOPI protocol.
Open WOPI is a free and open WOPI Client, based on the MS-WOPI protocol specification. It is compatible with SharePoint 2013, Exchange 2013 and Lync 2013. Currently supported file formats
A bundle providing routes and glue code between Symfony and a WOPI connector.
Project to integrate Microsoft Office 365 to Pega PRPC Platform