This is the prebuilt OnlyOffice client builds from https://github.com/cryptpad/sdkjs/tree/cp7.3.3.60 and https://github.com/cryptpad/web-apps/tree/cp7.3.3.60. OnlyOffice is licensed under the GNU Affero General Public License.
Use ./build.sh, if you want to build OnlyOffice yourself.