Simple, but awesome. About two years ago I had the idea (but never implemented) to try and re-make various since use web tools and calculators using modern web

Simple, but awesome. About two years ago I had the idea (but never implemented) to try and re-make various since use web tools and calculators using modern web technology. Things like interest/mortgage calculators, voltage drop calculators, difference between two dates, etc. So many of them like Time.gov rely on stuff like Flash or Java, or 1998 style Javascript, which I don't really dig. Definitely a nice little hole there for making something cool.