Apache OpenOffice Calc — for MS Windows, Linux and the Apple Macintosh. Started as StarOffice, later as OpenOffice.org. It has not received a major update since 2014 and security fixes have not been prompt.
Collabora Online Calc — Enterprise-ready LibreOffice, included with Online, Mobile and Desktop apps
Gnumeric — for Linux. Started as the GNOME desktop spreadsheet. Reasonably lightweight but has very advanced features.
LibreOfficeCalc — developed for MS Windows, Linux, BSD and Apple Macintosh (Mac) operating systems by The Document Foundation. The Document Foundation was formed in mid-2010 by several large organisations such as Google, Red Hat, Canonical (Ubuntu) and Novell along with the OpenOffice.org community (developed by Sun) and various OpenOffice.org forks, notably Go-oo. Go-oo had been the "OpenOffice" used in Ubuntu and elsewhere. Started as StarOffice in the late 1990s, it became OpenOffice under Sun and then LibreOffice in mid-2010. The Document Foundation works with external organisations such as the Apache Foundation to help drive all three products forward.[5]
Siag — for Linux, OpenBSD and Apple Mac OS X. A simple old spreadsheet, part of Siag Office.[6]
Sheets — for MS Windows, Linux, FreeBSD, Apple Mac OS X and Haiku. Part of the extensive Calligra Suite. Possibly still mainly for Linux, but ports have been developed for other operating systems.[7]
Kingsoft Office Spreadsheets 2012 – For MS Windows. Both free and paid versions are available. It can handle Microsoft Excel .xls and .xlsx files, and also produce other file formats such as .et, .txt, .csv, .pdf, and .dbf. It supports multiple tabs, VBA macro and PDF converting.[10]
Lotus SmartSuiteLotus 123 – for MS Windows. In its MS-DOS (character cell) version, widely considered to be responsible for the explosion of popularity of spreadsheets during the 80s and early 90s.[citation needed]
Microsoft OfficeExcel – for MS Windows and Apple Macintosh. The proprietary spreadsheet leader.
Microsoft Works Spreadsheet – for MS Windows (previously MS-DOS and Apple Macintosh). Only allows one sheet at a time.
Quattro Pro – Originally introduced as a stand-alone DOS and Microsoft Windows application, it eventually became part of WordPerfect Office in 1994.
StarOffice Calc – Cross-platform. StarOffice was originally developed by the German company Star Division which was purchased by Sun in 1998. The code was made open source and became OpenOffice.org. Sun continues developing the commercial version which periodically integrates the open source code with their own and third party code to make new low price versions.
Resolver One – a business application development tool that represents spreadsheets as IronPython programs, created and executed in real time and allowing the spreadsheet flow to be fully programmed