http://nihongomaster.com from the basics hiragana & katakana to higher level things

http://www.linguti.com/course/japanese/lesson/1_1_1

<a href="http://genki.japantimes.co.jp/self_en">http://genki.japantimes.co.jp/self_en</a> great supplement if you are using the genki system

http://wanikani.com is great for learning Kanji

Of course this one

then there are a few apps that are good for learning Japanese as well

Memrise includes all sorts of options like audio/video with native speakers

HiNative this one you can get help from native speakers

HelloTalk you can find a language partner