I think I may have given the wrong impression of italki. Registering on it is free. The only paid part is arranging Skype lessons with their tutors (which go for, I guess, competitive fees, starting with $10 / hour, which is like... I mean, if I spent money at this rate regularly, I'd only last a couple days). And I think there's also, like, volunteer tutors that don't charge anything. You might want to check it out.

As long as I'm on the topic of sites, there's another site with journal functionality, called lang-8. Unfortunately, I've read that the people behind it stopped working on it (and there's still a lot of issues with it). They switched to their other site, called HiNative, which is also a smartphone app (making it more profitable, I suppose). I don't know if you've checked it out yet (I think it should pop up in suggestions quite often). Well, you just ask questions and native speakers answer them. And the questions can be of any level of banality. I've seen things like "How do you say "Hello" in Spanish?"... I think they even got responses... Well, sure they did, because your number and quality of responses influence your rank, and who doesn't like a good rank.

I have ignored them so far because I was studying (I should say "am", but that's kind of confusing, with Welsh) Polish, with which I quite frankly didn't need help... Maybe it's time to return now.