Complex sentence: Pidgin (formerly named Gaim) is a free and open-source multi-platform instant messaging client, based on a library named libpurple that has support for many instant messaging protocols, allowing the user to simultaneously log into various services from one application.
Split into simpler sentences: Pidgin (formerly named Gaim) is a free and open-source multi-platform instant messaging client, based on a library named libpurple. Libpurple has support for many instant messaging protocols, allowing the user to simultaneously log into various services from one application.