eyeOS is a Web Desktop done with PHP and MySQL. Versions until 2.0 are Open Source.
For later versions please visit eyeos.org
License
Affero GNU Public LicenseFollow eyeos
Other Useful Business Software
Stop Storing Third-Party Tokens in Your Database
Rolling your own OAuth token storage can be a security liability. Token Vault securely stores access and refresh tokens from federated providers and handles exchange and renewal automatically. Connected accounts, refresh exchange, and privileged worker flows included.