eqExam is just a wonderful LaTeX package for writing things like exams and quizzes. It takes into account most of what you are about right out of the box like whether you are proctoring the exam online or in printed form and whether you want an answer key printed or not. Here is an example [...]
Here, for OS X, is a native PDF editor (or PDF based word-processor, depending on how you look at it). It seems interesting; and perhaps “easier” than LaTeX. (via downloadsquad)
GNUPlot has always seemed like a great tool for presenting data in a visually compelling manner. This might make it easier to do so. I am waiting for the right opportunity to justify buying it :).
Wufoo is an online surveying tool that looks interesting. I haven’t used it myself, but, it is what my webhost uses and they have pretty good taste in the tools that I have seen them use so far.