There are several manga adaptations of Last Exile.
Fam, the Silver Wing manga (Last Exile - Ginyoku no Fam) -- A direct adaptation of the anime Last Exile - Fam, the Silver Wing into manga form.
Last Exile - Travelers from the Hourglass (Last Exile - Sunadokei no Tabibito) -- A spinoff manga set during the end of Last Exile and beginning of Fam which follows Claus Valca and Lavie Head.