Cartoonists Rights Network International has announced a cartoon competition dedicated to cartoonists in Iran:

Since 1992, CRNI has been the only organization in the world dedicated exclusively to defending the free speech rights cartoonists everywhere. Through this contest we want to bring to the world a testament to the most experienced Iranian cartoonists and to those who have never yet published anything. We welcome cartoonists at every level and with every perspective.

For more information, and the competition rules, visit the competition's Facebook page.

The International Campaign for Human Rights in Iran has collected one year of editorial cartoons by prominent Iranian cartoonist Touka Neyestani (published weekly on their website) in the book 'Drawing Repression':

Beginning in April 2012, the Campaign has been featuring a weekly editorial cartoon drawing attention to the ongoing daily human rights violations in the country. Drawing Repression collects Neyestani’s responses to individuals, events, and developments over the course of one year, highlighting individual human rights abusers holding high office, prisoners of conscience continuing the struggle for basic rights, major events of the year—including earthquakes and cultural celebrations—and intensifying trends of violations against the Iranian people.

You can order a copy here.