All8's BeatFinder is a tool for BPM finding.
Scales&Chords is a tool for scale finding, chord progressions and more.
Attack Magazine contains beat making drum patterns dissected, explained and shown as sequencer patterns.
HowToMakeElectronicMusic is a website with tutorials, music production tips and reviews. They are often based on FL Studio, but you can use them with LMMS too.
BedRoomProducersBlog too contains tutorials and reviews, and also some news about discounts on commercial products.
Audacity is a great multiplatform program for recording and editing audio.
Compedium of all possible scales analyzed mathematically.