Fun website for Japanese learners!
I recently discovered this site (http://www.sljfaq.org/cgi/index.html) and I've been having a ton of fun with it. You can convert your name into ateji (sort of like using kanji as an alphabet instead of word system), convert English words into katakana and vice versa, and even pull up a full conjugation chart under the "Inflect verbs" menu. Heck, you can even put in fake words and it'll still give you a conjugation chart, which is...basically useless but still fun to use.
They also have neat articles like why people call 円 "yen" despite Japanese not having a "ye" sound, and how to convert English words into katakana on your own without a converter. I'd recommend giving it a look if you're interested in learning more about the history of Japan alongside the language ^^