Some useful and relevant sites include:

Red Hat Satellite

• Satellite Product Pages
• Satellite Product Documentation
• RHN Classic (Hosted) Application - part of Red Hat Customer Portal

Spacewalk

• Spacewalk Wiki
• Spacewalk Mailing Lists
• Spacewalk on GitHub
• Spacewalk in Bugzilla

Systems Management

• Cobbler - Provisioning and Kickstarts
• FreeIPA - Identity, Policy, Audit tool using Kerberos and LDAP
• Pulp - Software Management
• Katello - Systems Management
• The Foreman - Provisioning and Kickstarts
• Candlepin - Subscription Management