Free computer algebra system, compatible with existing CAS, as a C++ library with various user interfaces (GUI with formal spreadsheet and exact dynamic geometry, on-line, readline, emacs, texmacs...).
qdCAS is a Computer Algebra System for Pocket Pc. It is based on the very powerfull Bernard Parisse's GIAC/XCAS computer algebra system (the author of HP49G software) You can use it for any kind of numeric or exact symbolic computation (Polynomial arith