Short.io supports Okta, AWS SSO, PingFederate, Onelogin, ADFS, and other SAML-compatible providers to configure SSO.
Note: Short.io SSO is available on the Enterprise Plan.
The SiteMinder software is not available online, and you must have an account with Computer Associates to obtain the software.
Here's how to install SiteMinder: https://techdocs.broadcom.com/content/broadcom/techdocs/us/en/ca-enterprise-software/layer7-identity-and-access-management/single-sign-on/12-52-01/installing/install-ca-siteminder-sps.html
Here's how to configure SSO: