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Apps with 'Symbol Libaries' feature

  1. SMath Studio - is a math program with 'paper'-like interface and numerous computing features. It has an ability to work with systems, matrices, vectors, complex numbers, infinities and fractions.

    a= matrix(20:2) b=matrix(20:3)
  2. QElectroTech is a free software to create electric diagrams. QElectroTech is under GNU/GPL license. It is currently available for Windows, Mac OS and Linux.