[...]BLTTiM [1]CBLAS from critlibEd Hume's pure-Tcl linear algebra package [2]matrixNAPVKITNArray [3]LinearAlgebra Tcllib::linearalgebra for users of Tcl8.4 (and possibly earlier) for vectors, matrices and linear equation solvers. Documented in the Help pages.Ratcl is starting to get some vector/matrix operators.TclMatrix3d an RPN expression command for affine transformations3d Matrix Inversion inverts 3x3 matricesmatrix in PLplotMatrix incr tcl class in a small operating-point circuit simulatorTIP#314 [4] contains as an example an ensemble for doing matrix arithmetic over arbitrary rings.3D rotation matrices can be constructed in Euler Angles.