From
iPlanet - answers.com:
iPlanet
The brand name for software from the Sun-Netscape Alliance. Most Netscape products were renamed iPlanet after the joint venture was organized. See Sun-Netscape Alliance.
The suite of iPlanet offerings included:
* iPlanet Directory Server (an LDAP server)
* iPlanet Web Server (an HTTP and HTTPS web server)
* iPlanet Portal Server
* iPlanet Portal Search (formerly Netscape Compass)
* iPlanet Application Server (a J2EE application server system)
* iPlanet Messaging Server (a SMTP, IMAP, POP3 and webmail mail server)
* iPlanet Calendar Server
* iPlanet Meta Directory
* iPlanet Instant Messaging Server
FYI, info found using google search.