Abracalc v2.2 by Abrasco is a decent spreadsheet with some handy built-in help.  Issue 7 of Commodore User magazine has a review along with a cheat sheet.

Calc v1.0 by David Pankhurst is a full featured spreadsheet for the Commodore 64 featured on Loadstar disk #79.  Full documentation is included on the disk image.

C64 Datatool is proper for inputting, editing and printing any kind of data in tabular form. In the simplest way of use, the program will store lists of words or numbers. Data processing (e.g. spreadsheet analysis, statistics or data conversion) can be programmed in BASIC. In the most advanced way of use, Datatool is nothing but a particular environment for your own BASIC programs.

Microsoft Multiplan v1.07 for both the Commodore 64 and Commodore 128.  I got this to work in VICE 2.4 on both, but only in 40 column mode on the C128 emulation.  Probably works fine in 80 Column on a real C128.

Power Plan 64 is a very capable spreadsheet for the Commodore 64 as can be seen by the manual which is over 200 pages.  There's a nice article in the November issue of Compute's Gazette (Issue 29, page 29) titled "Anatom of a Spreadsheet" you should check out if you're interested in reading more about the available spreadsheets for the C64.

Big thanks to Raj, one of our visitors, that shared a .g64 image (all protection in tact) of this program.  I've been unable to find a version with the protection removed, so if you have an unprotected copy and would like to share, please use the Contact Us link to get in touch.

SpeedCalc was the spreadsheet counterpart to the very popular SpeedScript word processor. Written by Kevin Martian and published by Compute! Magazine. SpeedCalc offered very basic spreadsheet capability in a manner similar to VisiCalc spreadsheet developed for a in-home microcomputer.

Simply called "Spreadsheet", this is from Green Valley Publishing.  Very similar to other spreadsheet except that the data entry is unique.

SwiftCALC 64 by Timeworks is a nice spreadsheet program for the Commodore 64 that offers the unique ability to print out sideways.

Turbo Calc 64 by Gregory R. Schmalhofer for the Commodore 64, published by Softdisk in 1985.  Turbo Calc is a spreadsheet application, but I haven't been able to find any information on it other than what's built into the program.  Thankfully there is pretty thurough help built-in, so it should be useable without a manual.