There are tons of plans available on the internet if you know where to look (would suggest TOR if you get into some of those sites). Two of the most popular include The Poor Man's James Bond and The Anarchists Cookbook. Those are actually mild compared to some I've seen that have the instructions for some pretty nasty explosives (surprisingly easy to make). The Norwegan shooter's manifesto also has some pretty detailed instructions included.
There’s instruction videos for mixing this stuff. We have some of them up on the main site, not as videos but as a limited few frames. can’t make anything from them. But the visitor list is very interesting :).