Libral is an address book engine. It allows you to create your address books and to add personal and company cards to them. Data managed in a personal card include personal data (name, surname, address, etc.), Web links, email addresses, irc uris, telephone numbers, job information (company where the contact works, manager, collaborator, etc.), and notes. In a company card you can manage Web links, email addresses, telephone numbers, and notes. XML is used to store data. Libral can import addressbooks from GnomeCard, Kaddressbook, VCard, Evolution, and CSV.
Libvc is a vCard library which was written using 'flex' and 'bison'. It handles scanning a vCard file, parsing the vCard file into a data storage structure, manipulating the data storage structure, and writing the structure back to a file. It was originally written for 'rolo', but has been split off for general use.
mod_psldap is an Apache module that performs authentication and authorization against an LDAP server with LDAP based session management. It also provides Web 2.0 based capabilities to add, edit, move, and create new records in the LDAP store, leveraging XSL stylesheets to offload heavy processing to the clients and reduce bandwidth consumption by up to 95% or more.
Otak provides a visual interface to command line programs that don't have one, that allows users to select arguments from a menu. For example, it can be used as an address book program with Mutt (the default), or as a phone book with SMS sending software, or even as a list of hosts for SSH or FTP.