OT: Absolutely SUPERB composer tool
This desktop app is new, so you may not have heard about it. It's also relatively expensive, but the results I've been getting are phenomenal! After an hour I had a very pleasant string quartet piece that I can listen to again and again. It also does ambient, electronic, and several other genres. If you are stuck with writer's block, this could be the perfect tool. I've also used it as a source for noodling with synthesizer settings, because then I can focus on the synth instead of playing simultaneously. NOTE: I have no affiliation with this company or product. I'm just sharing what I think is a great but relatively unknown composition tool.