Wordology

I tried a lot of similar extensions and this one is the best. It combines functionality and simplicity well. Also, if you are bothered with all words being red, you can make the red highlighting invisible in the options. Edit: The only downside of it is that it only accepts single words and not phrases.

good

I use this extension with IM Translator and Dict.cc for definitions. Then I can reread foreign-language articles and have an instantaneous translation of words I've forgotten.

Cool but pretty strange implementation. Why I can't just click and mark the word as "known"? Why should I type a translation every time? Wouldn't it be more convenient and logical to translate unknown words only?

This is an amazing Extension! Super useful! Just one question: How can I add a phrasal verb or a collocation?