IFComp is the Interactive Fiction Competition.
From the IFComp web site:
"The Interactive Fiction Competition is an annual event begun by passionate hobbyists in 1995 to encourage both the creation and the discussion of new interactive fiction works (also known as IF). While the definition of IF has evolved in the years since then, the IFComp’s format and schedule have remained stable since the 1990s. Anyone can judge the entries on a one-to-ten scale, and the laurels go to the entries receiving the best average rating."
More information at http://www.ifcomp.org/about/comp.