The core of SocialCalc is basically the Perl and JavaScript source  
code for editing and rendering sheets. Remember, this code is  
licensed under the Artistic License 2.0[1] which means you can freely  
use, modify, and distribute it. You can also send us patches and get  
involved.

The code in the core lives under the following directories in  
socialcalc:

lib/SocialCalc   - The Perl Code
jslib/SocialCalc - The JavaScript Code
share/socialcalc - Data files and such

What isn't in the SocialCalc Core?

Another great question! That would be anything not directly involved  
in running the editing screen or rendering the HTML view of a  
spreadsheet. This includes publishing sheets; site, host, and user  
administration; interfaces for formatting, tools, and logging out;  
scripts; distributed html and page temmplates; and build systems.

[1] http://socialcalc.org/licenses/al-20

--
Casey West