Grammar Companion Site
Is there a site that uses gamification like Duolingo but focuses more on grammar? I know of studyspanish.com but the whole reason I have stuck with Duolingo is gamification.
http://www.hellomylo.com/ This site is not really focused on grammar any more than Duolingo, but it is a lot of fun because it just feels like a game. Its content is organized by task, which is useful for sort of putting everything together. It also has some useful tools, such as a phrase book and cultural notes section, that give a bit more information than DL does.