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LibXL is a library for direct reading and writing of Excel files (xls/xlsx) without OLE automation and Microsoft Excel. Supports C, C++, C#.NET, Delphi and other languages.

Ceemple is an innovative solution enabling rapid C++ based technical computing. It features the productivity of MATLAB and Python, combined with the performance and integration of standard C++.

SourceForge.net. Fast, secure and free downloads from the largest Open Source applications and software directory

.Net Excel spreadsheet library,formula calculation engine,generate excel spreadsheet and 3D chart

Read / write Excel (XLS, XLSX, ODS, CSV, HTML) files from C# / VB.NET and use AdWords / adCenter APIs from one simple interface.

Project providing a set of classes for the PHP programming language, which allow you to write to and read from different file formats, like Excel 2007, PDF, HTML, ... This project is built around Microsoft's OpenXML standard and PHP.

Forum, Wiki, FAQ, Groups - the official Qt community site. Here you can get started with Qt, read tutorials, find solutions to your challenges and get up to date on the latest developments.

MathWorks is the world’s leading developer of technical computing software for engineers and scientists in industry, government, and education

This project is the .NET version of POI Java project at http://poi.apache.org/. POI is an open source project which can help you read/write xls, doc, ppt files. It has a wide application. For example, you can use it to generate a Excel report without...