jQuery Calx is powerful yet easy to use jQuery plugin for building calculation forms or calculation tables. It parses provided formulae and performs calculations, scans for form changes and updates results automatically, and formats plain numbers into currency format, ordinal numbers, etc. It is suitable for both simple ($A+$B) formulae and complex ones such as ($I*$P*((1 + $I)^$N)) / (1 - ((1 + $I)^$N)).
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.
ExportSpreadsheets is a class that can be used to create an Excel spreadsheet from data in a MySQL table. It performs a query to a given MySQL table and creates an Excel spreadsheet file using the PEAR Spreadsheet_Excel_Writer package. The class can export multiple worksheets to a single Excel file. Several parameters may be used to configure details like which table fields map to which spreadsheet columns, field sorting, etc.
KeyValue is a cross-platform library for making C++ objects accessible through LibreOffice Calc, Excel, and other front-ends. This can enhance the experience of spreadsheet users by providing an object model and a handy key-value based interface. Actually, KeyValue does more than just help creating spreadsheet functions. The object model allows end-users to build C++ objects through the front-ends. These objects are stored in a repository for later use at the user's request. Additionally, KeyValue provides a set of services to effectively use these objects. The library is named after one of its main features: the key-value based interface. Parameters are passed to functions (or, more precisely, processors) through key-value pairs, in contrast to the standard positional interfaces of LibreOffice Calc, Excel, C/C++, etc.