Bible.org
Bible.org: Who Is Ezekiel's Daniel?
This Bible.org site covers Ezekiel the Prophet extensively. It concentrates more on Ezekiel himself than his Book.
ibiblio
Ibiblio: The Book of the Prophet Ezekiel
This site from Ibiblio contains the complete Book of the Prophet Ezekiel. It is broken down into chapters for easier reading and is worth checking out.
Luther Seminary
Bible Tutor: Ezekiel
This site from The Bible Tutor briefly covers Ezekiel the Prophet, then it provides a few links to some of his passages and explanations of his passages. The information is worth checking out for a short background on the subject.
Other
Cri: Ezekiel and the Oracles Against Tyre
This site covers Ezekiel's Prophecy about the destruction of Tyre.
New Advent
Catholic Encyclopedia: Ezekiel
This site covers Ezekiel the Prophet according to the Catholic Encyclopedia. Please note that ?The Catholic Encyclopedia? is a historic reference source and should be viewed in the context of resource material dated around 1910.