Ok, you can't (page not found), but the link above is "Try Cincom Smalltalk": https://www.cincomsmalltalk.com/main/try/ there you can download a "personal edition". Well, you have to fill out a form and provide some information to get the download link.
If you scroll down to the bottom/footer, under "Get started" you can click "Buy Cincom Smalltalk": https://www.cincomsmalltalk.com/main/product/cincom-smalltal...
Ok, you can't (page not found), but the link above is "Try Cincom Smalltalk": https://www.cincomsmalltalk.com/main/try/ there you can download a "personal edition". Well, you have to fill out a form and provide some information to get the download link.
Perhaps this is an option for you.