plotly.js | JavaScript Graphing Library

https://plot.ly/javascript/

Built on top of d3.js and stack.gl, plotly.js is a high-level, declarative charting library. plotly.js ships with 20 chart types, including 3D charts, statistical graphs, and SVG maps.

cpp-btree - C++ B-tree - Google Project Hosting

https://code.google.com/p/cpp-btree/

C++ B-tree is a template library that implements ordered in-memory containers based on a B-tree data structure. Similar to the STL map, set, multimap, and multiset templates, this library provides btree_map, btree_set, btree_multimap, and btree_multiset.