Calligra is an integrated suite of applications that cover office, creative, and management needs. It offers applications on both desktop computers and mobile platforms like tablets and smartphones. OpenDocument Format (ODF) is used, making it compatible with OpenOffice.org, LibreOffice, and Microsoft Office. Calligra Suite contains the following applications: Calligra Words (word processor), Sheets (spreadsheets), Stage (presentations), Flow (diagrams and flowcharts), Kexi (visual database creator), Braindump (note taking), Plan (project management), Krita (drawing), and Karbon (vector graphics).
mtCellEdit is a lightweight spreadsheet program. Its main goal is to provide facilities for simple day-to-day tasks using a minimal graphical user interface. It uses TSV based file formats to ensure that archived data is always accessible to other programs, regardless of operating system, both now and in the future. These "other programs" might be spreadsheet programs, text editors, command line tools, or custom built programs. It is written from scratch and provides all of its core facilities via a library, so any C program can access its API.
Aspose.Cells for SharePoint is a flexible solution for converting Excel documents into multiple document formats within Microsoft SharePoint applications. It lets you easily convert documents right from the SharePoint document library into popular formats like XLS, XLSX, CSV, HTML, ODS, PDF, XML, and TXT without using MS Excel for document generation. It is designed to be used with Windows SharePoint Services 3.0 (WSS) and MS Office SharePoint Server 2007 (MOSS) standard and enterprise editions.