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Re: Simple spreadsheet program.

> An alternative is org mode in Emacs if you have Emacs already
> installed.  Simple spreadsheet capabilities in tables.

There's also SES, also part of Emacs (i.e. C-x C-f <foo>.ses RET should
get you started).  And Emacs being what it is, there's also the Dismal
package, which you can install from GNU ELPA.