Wiki made easy Rated 5 out of 5 stars
WikiLook was created with sole purpose of promoting Wiktionary, a MUCH better dictionary them M-W or American Heritage. Wikipedia was added to gain some extra popularity and to compete with Answers add-on, again with a purpose of raising general public awareness of Wiktionary existence. Supporting any other dictionaries or non free encyclopedias definitely out of scope of the project. But source code is available and nothing prevents forks from popping up.