The leading internet companies do show an astonishing dynamic on developing new services and features. Just a couple of days ago Twitter has introduced the “List” function (s.a. the introduction to Twitter Lists at the FOLDEN eMedia Blog). Now there are already a couple of professional services available to use this feature.

Listiti is a monitoring tool, which works by submitting the name of a list and a keyword. The application sends the information to an email address.

Listorious is a directory for lists to search for lists and to submit them.

The post already mentioned above is giving a brief but worthful introduction to the Twitter List feature. The functions are explained and a case study is giving an example of professional use:

The Twitter List Feature

Directory Sources: Microblogging - Social Web Research