I've been looking for a replacement for Evernote for a while. So far I've tried wikis, bluenote, vim + git + markdown.
The most important feature keeping me with Evernote is the ability to drag and drop images.
vim + git + markdown\n
\nThis, actually using vimwiki, is my setup for both my private knowledge management/kind of diary system and my lab notebook at work for quite some time now. Works flawlessly. See [0] for a pretty nice setup.Doesn't solve your image issue, but for text-only it's a pretty nice solution if you're comfortably living in vim anyway.
Thanks. I'm doing something similar with Gollum [0].