Looking at the (very impressive) Sprout libraries that distributes using the Boost license: Welcome to the Sprout C++ Libraries <http://bolero-murakami.github.io/Sprout/docs/index.html#welcome-to-the-sprout-c-libraries> C++11 constexpr based Containers, Algorithms, Random numbers, Parsing, Ray tracing, Synthesizer, and others. https://github.com/bolero-MURAKAMI/Sprout ...It appears to be actively maintained, and very interesting. Anybody know the background and roadmap on these libraries (they are not in Boost now, right?) I'm particularly interesting in more 'constexpr' and compile-time libraries showing up, where C++14 (and C++17) wholly "throws-open-the-door" on what you can do at compile time (for example, see the C++14 constexpr used as a full C compiler: https://github.com/kw-udon/constexpr-8cc ) Crazy stuff. --charley