Other
Spelling police.com: Irony
Informational site that provides the definition for and examples of irony.
University of Victoria (Canada)
The U Vic Writer's Guide: Literary Term: Irony
This site from The UVic Writer's Guide provides an excellent description of the literary term "irony." Content includes a focus on dramatic irony, structural irony, and verbal irony.
Rutgers University
Rutgers University: Glossary of Literary and Rhetorical Terms: Irony
Definition of "irony" and a discussion of the three types: verbal, dramatic, and cosmic.