ixlib is a small c++ tools library based upon the standard template
library. It provides

  - a javascript interpreter
  - an exception handling framework
  - garbage collection
  - automatic array management
  - planar geometry (rectangles, regions)
  - polygons (rasterization, convex hull, smoothing, removal of
    crossings)
  - rasterization primitives
  - matrices (including linear system solver, Cholesky and LU
    decomposition, determinants, inversion, Gauss and Gauss-Jordan
    elimination)
  - command line parsing
  - versatile int <-> string conversions
  - regular expressions
  - xml parsing (non-DTD)

WWW: http://ixlib.sourceforge.net/