I've been using Google and Wolfram Alpha for these things over the years, but it has always irked me that I'm sending this info to a third-party, to run through their services that I have no way to read or improve the code, and knowing that these things are only available to me if I'm online. I was really happy when I found out the DuckDuckGo Instant Answers modules' source code is open.
It's been on my list of things that I will almost definitely never take the time to actually work on, but I wished what I had was (A) a browser extension or GNOME extension that incorporates an offline version of all the DuckDuckHack modules, and (B) the same thing in an open source mobile app. (This kind of thing could just as easily live in a command line app, though, and I'd be super happy if a project maintainer incorporated them into something like GNU Units.) I looked into it, especially for (B), but I realized that the DuckDuckHack code depends on Perl.
It's been on my list of things that I will almost definitely never take the time to actually work on, but I wished what I had was (A) a browser extension or GNOME extension that incorporates an offline version of all the DuckDuckHack modules, and (B) the same thing in an open source mobile app. (This kind of thing could just as easily live in a command line app, though, and I'd be super happy if a project maintainer incorporated them into something like GNU Units.) I looked into it, especially for (B), but I realized that the DuckDuckHack code depends on Perl.