Version
7.0 of the ONLYOFFICE office suite is available.

With the release of Docs v7.0, ONLYOFFICE opens the source code
of the professional editing features, such as document
comparison, content controls and sheet views for spreadsheets,
and makes them available in all solutions. Previously, all
these features were exclusively accessible on a paying basis.

There is a long list of new features; see the announcement for details.

Source: LWN.net – ONLYOFFICE 7.0 released