緑花/Midoribana/GREENFLOWER is a tiny little LJ comm where fratrandas members put useful tutorials for Midori Tachibana (立花緑), a.k.a. oasis_stardune! You can also join and add stuff of your own if you like, but if you don't behave and/or make Midori cry, you get banned. Or really, kicked out of the sandbox.
THE MIDORI:oasis_stardune! A.k.a. Midori, a.k.a. AMBERRRRR.
Other Cool LJ TutComms: s2styles and s2layers are all about the new s2 layout system that LJ adopted in addition to s1 a while back. lj_styles and howto are still mostly focused on the s1 system, though, if that's more your thing...