By John Ulmer
I often have questions about French usage that can't be solved by a dictionary, so I have been relying on Linguee quite a lot.
For each word or phrase you can get a long list of real-world usages pulled from the Web.
It covers many languages, though I can only vouch for the French content as I haven't used it for any other languages so far.
Hello! My name is Eirini and i come from Greece. I speak Greek, French and English fluently. I offer online lessons at very low prices all over the world! If you want to learn Greek, drop me a message! Package lessons are offered at lower prices! Homework, material are offered for free to my students! My website is http://www.multilinguers.com. There you can find more languages you could learn! If you speak with me, i can arrange lower prices for the other languages as well!
By Marc Weber
http://mawercer.de/spell is an early attempt to train spelling in various languages.
English, German, bengali, and many more coming soon -> write to support to have some added.
It remembers which words you got right doesn't ask multiple times about the same word.
You can use it from mobile phone.