So, I sometimes use my QWERTY keyboard as a way to input notes. Like a lot of people, I'm sure. So, a few years ago I went for a quest to find the best QWERTY to MIDI software there is. I'm pretty sure I've tried them all, and my conclusion is this: Virtual Midi Controller is the best software in it's class. No competition. The top. 5 stars.
Please go check it out:
You can download the free version and make your mind about it. If anything, you'll probably at the very least keep this light version and use it a lot. But the full version is well worth the 20$, so you'll be going for it very soon. Think about it: how much did you pay for your last hardware piece of gear? We're not talking about a "me too" soft synth or FX here, but of a piece of software that will be possibly used every single day and that might change the way you do music.
Martin, the conceptor, is a nice guy and his software never got the exposure or the recognition it deserve. Hope this post will help a bit. If there's interest I might post some patches for it.
SoundCo - Virtual MIDI Controller