phpLDAPadmin is a web-based LDAP administration tool for managing your LDAP server. With it you can browse your LDAP tree, view LDAP schema, perform searches, create, delete, copy and edit LDAP entries. You can even copy entries between servers.
NIUS allows reservation of nodes under it's control for exclusive interactive use by a group of users. This system is in use by National Center for Data Mining at University of Illinois in Chicago to reserve workstations for researchers.
A portal project providing useful information for those who have the hard job administering a school network.
Hints, tips, configurations and special software for servers that can be used in educational environments can be found here.