Hi
For Me They Are :
1- TriBALL/catalogue browser
2-Extrude / 3- edit cross section /4- sketch all commands / 5- Trim / 6- match face / 7- Smart dimension/ standard view( CAXA )/ 8- spin & sweep / 9-assembly, Boolean / 10- export/save as/import /FEA
Regards
Mehraeen