QBasic                 EXE  tutorial    Prog    
     
                             
    
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                                            Xcas     
              link  -  doc    calcolo simbolico
           
      
                                     Geogebra           algebra-geometria-analisi
                                                           
                                         
    
                                        WxMaxima        calcolo simbolico                                                                                                                                                                                                     
                                             WIMS                          
calcolo on line

                                
                                            Informatica       sito Majorana 
(A. Cantaro)