Isinglass is a firewall setup script designed to protect dial-up users. It protects a user's system against security holes in programs user may not even know are running. Most users can run it "out of the box" without any configuration required. It will automatically detect network interfaces and IP addresses. isinglass-hzd is an unofficial bugfix/2.2 support release.
Mod_Corba is a plug-in module for the Apache web server. Mod_Corba exposes the Apache "module" API via CORBA. With this, any object in any language on any system can be used as a plugin module for an Apache web server, without recompiling or restarting the server. Since the entire internal operation of the Apache web server is based on the module API, the possibilities are almost limitless.