Simplenote everywhere (including Dropbox)
I bought into the Simplenote world from the moment I read John Gruber rave about it. Since then I have relied heavily on the Simplenote platform for both personal and professional note taking and list making. The beauty of Simplenote lies in its unique restriction to plain text. I have been tempted by the luxuriousness that is Evernote. However, after a brief project to extract all of my notes from Evernote into a file structure that would outlive the hosted service, I realized that there was safety in simplicity.