Since wikipedia is subject to change on a moment's notice, I'm burying a copy of the relevant text of that page here, in case the page goes missing.

"The Qur'an speaks of God appointing two classes of human servants: messengers (rasul in Arabic), and prophets (nabi in Arabic and Hebrew). In general, messengers are the more elevated rank, but Muslims consider all prophets and messengers equal. All prophets are said to have spoken with divine authority; but only those who have been given a major revelation or message are called messenger.

Notable messengers include Adam, Noah, Abraham, Moses (Musa), Jesus (Isa), and Muhammad, all belonging to a succession of men guided by God. Islam demands that a believer accept most of the Judeo-Christian prophets, making no distinction between them. In the Qur'an, 25 specific prophets are mentioned.

Mainstream Muslims regard Muhammad as the 'Last Messenger' or the 'Seal of the Prophets' based on the canon. However, there have been a number of sects whose leaders have proclaimed themselves the successors of Muhammad, perfecting and extending Islam, or, whose devotees have made such claims for their leaders. However, most Muslims remain unaffected by those claims and simply regard those said groups to be deviant from Islam."

Interesting that those who work to "perfect or extend Islam" are marginalized. Is Islam really done evolving? One could draw parallels with Christianity I suppose.