These are some examples of basic frameworks on several platforms. If your platform supports plug-ins (e.g. Wordpress) the example plug-in configurations page may also be useful.
Any OpenID Connect framework should work without difficulty and those recommended by http://openid.net/developers/certified/ should all be fine choices. This page lists a selection that we have used during development and is by no means an exhaustive list of OIDC clients.
Whilst our service desk will always try to be helpful, we neither support nor maintain the applications referenced. All examples are illustrative only.
Java
PHP
.NET
Apache