Here are a couple of recommendations:
- Solitaire City from Digital Smoke. Not freeware, but you can have a big series of solitaire games, Spider is just one of them (the package contains FreeCell, Pyramid etc).
Its link: http://ppc.solitairecity.com/
Solitaire City demo: download here
They also have a version for iPhone/iPod Touch for purchase in Apple store. - Spider Solitaire from inDevSoftware. Not freeware, but definitely worth a try. The link : http://store3.esellerate.net/store/catalog.aspx?s=STR1466198190&pc=
Disclaimer: The programs above are not developed by us and we disclaim any responsibility.
Why not to compare Solitaire City (70 solitaires, $18.95) with inDev's Solitaires Unlimited (800 solitaires, $19.95)? :)