CTDB is a cluster implementation of the TDB database used by Samba and other projects to store temporary data. If an application is already using TDB for temporary data it is very easy to convert that application to be cluster aware and use CTDB instead.
Davenport is a servlet which provides a WebDAV gateway to SMB shared resources. Typical usage would be to provide web-based read and write access to Windows shared drives. WebDAV clients, such as Windows' "Web Folders" can copy files to and from the share
The net utility plays a key role in completing the configuration of a Samba-3 domain controller or activating and managing a Samba-3 domain member server.
A popular thing to do with Samba these days is to join a Samba 3 host to a Windows Active Directory domain. You may freely set up any number of Samba servers in a Windows network without joining them to the domain. The advantages of domain membership are