Geometric Algebra Mathematica package. Mathematica package for Clifford (geometric) algebra calculations: Main features: Textbook notation and precedences of products (without Mathematica palettes); Algebraic operations in orthonormal frame (additive representation, symbolic coefficients); Switching between multiple algebras in same Mathematica session; Matrix representations of Cl(p,q) algebras; Idempotents with different base element sorting; Main involutions and general multivector inverse.