Is there any note taking software designed for taking notes in school?
Solution 1:
I quite like FreeMind for taking notes - it's a mind map application.
You can create bubbles for each topic, and put detailed notes in each, decorate the bubbles with icons, and break large clusters out into their own linked files.
FreeMind is written in Java and will work on Windows and OSX as well.
For more prosaic note taking I often find myself using a TiddlyWiki - this isn't an Ubuntu app per-se, it's just an HTML page with some clever JavaScript embedded in it. You can take notes and link between topics easily, much like Tomboy. I have an empty TiddlyWiki in my templates directory so that I can create a new one with a right-mouse click any time.
Both these approaches work well on any major operating system - and TiddlyWiki doesn't even need you to install anything.
Solution 2:
I would recommend Zim, for the sake of brevity, i will not bother to go into details here, instead see the answer I provided to this question
Solution 3:
Well Ubuntu comes preinstalled with Tomboy notes which could be used for this purpose. It supports linking of notes and things like that. I have not really used it much personally, but you might want to try it out, though I feel as if you are looking for a more in-depth note taking software.