Minecraft for Nothing

 Searching "how to get minecraft free" will turn up nothing but spam and scams to try and get you to fill out a survey. Sure maybe there is one or two out there that actually do what they say that they do but I doubt it. But there is one way that you can use that will get you what you need to play minecraft, both on "offline servers" and on Single Player mode.

Vanilla

That is Mineshafter. Mineshafter, is basically a proxy application for the minecraft.jar file that convinces it that you have logged into the minecraft servers successfully. It will download all of the files that you need. As they say on the mineshafter website, if you really do enjoy playing the game then you ought to support it and what better way to do that than to buy the game straight from Mojang.

Mods

But wait, what if you want to play one of the many different mods that are out there? Well some one fixed that problem too. Welcome to Mineshafter Squared the way it works is the same it allows you to login through their servers and not mojangs. With mineshaftersquared you can download the 2 of the most popular minecraft mod launchers, Spout and Technic

Again this will NOT allow you on to the majority of the servers that are out there, there are some servers, like BitLegend that run in the offline mode and allow you to login without a account but there are not many.