Gnumeric is a full-featured spreadsheet program that is compatible with a wide array of formats.

Features

The Gnumeric spreadsheet is part of the GNOME desktop environment: a project to create a free, user friendly desktop environment.

• Free - Gnumeric and its source code are available free of charge, licensed under the terms of the GNU General Public License. This makes it easy to audit, and make custom extensions.
• Fast - Gnumeric handles large spreadsheets while remaining responsive.
• Accurate - A spreadsheet should calculate the right answer. Gnumeric's built-in functions and tools are accurate. A report praised Gnumeric as more accurate than leading proprietary spreadsheets.