Lafz - Urdu Words and Their Meanings - Daily e-mail newsletter helps subscribers build vocabulary by sending a word each day, not in Urdu script, with definition and a sher (couplet) where the word has been used. Alphabetical archives included. - http://www.urdupoetry.com/lafz/
Urduseek.com Urdu English Dictionary - First Online English to Urdu dictionary where users can view Urdu meanings in Urdu font. This dictionary also provides english to urdu, urdu to english word search. (Urdu Nastaliq) - http://www.urduseek.com/
Navin's Urdu-English Dictionary - Urdu-English Dictionary with information on Word Origin (Roman Urdu) - http://www.cs.wisc.edu/~navin/india/urdu.dictionary
UrduWord.com - Searchable English to Urdu dictionary. Displays Urdu script without requiring fonts. Also has an Urdu Word-of-the-Day feature and interactive Urdu content for other people to place on their website. (Urdu Naskh, Roman Urdu) - http://www.urduword.com