(Picture from TOETAL website)
I got this link from my friend Lucy. The site is named "TOETAL," and it seems to be pretty good. For my students who are going to be taking the TOEIC soon, or for anyone else who's interested in the test, it's a great resource. The exercises on the site are very similar to the actual TOEIC's format.
I'll try to provide some more TOEIC links soon. Until then, happy studying!