Japanese links

Here are some textbooks to study Japanese:

https://mega.nz/#F!AxZhHDbK!raQGnK1EDVixYCQXbJkdDA - Minna no Nihongo 1-4 with audio files. For the two beginner parts it even has extra stuff. The answer sheets for the texbook are at the very end of the pdf. There are even videos based on the main conversations of the lessons. They are absolute hilarious.
If you download this ignore the next links.

Here is a link to what I use - https://u.pomf.is/lgguqf.rar (it is in the full torrent)
It includes:
Minna no Nihongo Texbook, Texbook Answers, Translation and Grammatical Notes, Kanji Workbook, Grammar Workbook

MM1 Listening Comprehension 1 - http://www.mediafire.com/download/untk26u4bj6coh0/MMNI-choukai-CD1.rar
MM1 Listening Comprehension 2 - http://www.mediafire.com/download/k5omff768ta32kf/MNNI-choukai-CD2.rar
MNN1 Audio TextBook (reads some of the texts and stuff) - http://www.mediafire.com/download/oidd86p3jtccl0n/MNN+I+-+textbook+Audio.rar
The listening comprehensions in the big torrent are better arranged. The texbook ones are arranged on mediafire too.

Here is another link with some stuff, but not as many as the full torrent - http://yuki-nezumi.blogspot.bg/2011/10/minna-no-nihongo-i-ii.html

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Useful Smartphone Apps:
If you don't have a smartphone or don't want to waste your battery download Leapdroid emulator.
AnkiDroid - You can make your own decks of two-sided cards (for example: one side kanji, one side reading and meaning). I recommend making a deck of the kanji of every lesson. Instead of studying with it, which you can do, I use it more as a list of the kanji I have learned so far.
JED - Japanese Dictionary. On the app store is has red icon with a white kanji. You can search by translation, hiragana/katakana, kanji, anything.
Obenkyo - Similar to Anki, but with premade decks (JLPT5-1) you can choose what to study from. Very useful for studying hiragana, katakana, kanji, numbers and even particles. You can test kanji recognition (two types), kanji writing and other things. The search is a little clumsy, but it works.
Japanese Kanji Study - SImilar to Obenkyo, it groups kanji according to their N5-N1 (the tests) levels. It is paid, but you can find it with everything unlocked online. Here is a link for v1.8.16 [Unlocked] - https://my.mixtape.moe/jlyhdc.apk
JVerbs Lite - Simple, works offline and with no ads (a hard combination to find for this). Japanese verb conjunction plus explanations.
FBReader + FBReader PDF plugin for PDF reading on the phone.

Download both for your computer and smartphone Google Japanese input or some other alternative.