Note-taking tools

I'm looking for suggestions for a personal note-taking product to keep track of notes, ideas, links, images, and cool things. 

As best I can, here is a list of features I require:

• Some kind of offline editing or accessing
• Ability to upload images
• Searchable, or some kind of hierarchical structure so they can be referenced later
• Easy-to-use (flexible on this one, but it can't disrupt my workflow a bunch)
• Must be able to use on Linux

So far the suggestions I've heard are as follows:

• Personal blog
• Jekyll
• MediaWiki hosted somewhere
• EverNote (mac-only, so for Linux OneNote has been suggested)
• ORG-mode for Emacs (or Vim - I'm a vim user)
• SimpleNote
• GoogleDocs
• TiddlyWiki
• Asana
• Tomboy
• text files on Dropbox
• scanned PDF of notes uploaded to Mendeley or some other PDF annotation software
• http://www.webupd8.org/2012/09/everpad-integrates-evernote-with-ubuntu.html
• Zim (http://zim-wiki.org/manual/About.html)

I'm going to come back and make notes about each of these things later when I've had a second to look at them.