A desktop wiki like tool for keeping track of notes, phone numbers, and even has built in tools to use as your GTD system. It is cross platform running on Linux and Windows. With Dropbox you can keep your notes synced between all of your computers. You can even attach documents, files, and insert pictures too to keep all of your information in one place. Each note page is saved in plain text making it possible to edit the files with a normal text editor if you do not have Zim Wiki installed on a computer but have access to the files.
I sometimes want to copy and paste some text from a PDF that wasn't scanned with OCR (e.g. some essays in the Seminary Essay File). I take a screenshot of the paragraph and upload the screenshot file here.
(Screenshot-selection-to-file shortcut on a Mac is CMD + SHIFT + 4.)
All in one collaboration center. Group email, text, voice, meetings, conference calls, chat rooms, calendars, files, polls, and project management. Best of all, FREE!