Wolfram is a math major's best kept secret. Nickreboot is something I only recently discovered, but have yet to use it for fear of losing all impetus to do anything but that. The rest of these also sound awesome!
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This is wonderful. It's interesting to learn that even the most unfortunate trait(s) a person can have has a positive disposition too. // lmaooo i have depression, OCD and anxiety (and potentially bipolar disorder)