Handsontable Community Edition (CE) is an open source JavaScript/HTML5 UI Spreadsheet component for web apps. It easily integrates with any data source and comes with a variety of useful features like data binding, validation, sorting or powerful context menu. It is available for Vue, React, Angular and Polymer.

Handsontable - JavaScript/HTML5 UI Spreadsheet library for web apps. Available for React, Vue and Angular

Manage Firestore data in a spreadsheet-like UI, write Cloud Functions effortlessly in the browser, and connect to your favorite third party platforms such as SendGrid, Twilio, Algolia, Slack and more. It supports CRUD operations, Sort and filter by row values, Lock, Freeze, Resize, Hide and Rename columns, Multiple views for the same collection, Bulk import or export data - csv, json.

Rowy - Open-source Airtable-like experience for your database (Firestore) with GCP's scalability

Excelize is a library written in pure Go providing a set of functions that allow you to write to and read from XLSX / XLSM / XLTM / XLTX files. Supports reading and writing spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports complex components by high compatibility, and provided streaming API for generating or reading data from a worksheet with huge amounts of data.
 
With Excelize chart generation and management is as easy as a few lines of code. You can build charts based off data in your worksheet or generate charts without any data in your worksheet at all.

Excelize is a library written in pure Go providing a set of functions that allow you to write to and read from XLSX / XLSM / XLTM / XLTX files. Supports reading and writing spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports complex components by high compatibility, and provided streaming API for generating or reading data from a worksheet with huge amounts of data

Excelize - Golang library for reading and writing Microsoft Excel (XLSX) files

LibreOffice is the free power-packed Open Source personal productivity suite for Windows, Macintosh and Linux. LibreOffice is the perfect choice for home users, businesses, government and other organizations. It's native file format is the ISO standardized ODF (Open Document Format), but LibreOffice can open and save Microsoft Word, PowerPoint and Excel files, as well as many other formats, bringing you the widest-available compatibility with other products. It has 6 feature-rich applications for all your document production and data processing needs:
 
 <a title="Word processor" href="http://www.libreoffice.org/features/writer/">WRITER</a> is the word processor inside LibreOffice.Auto-completion, Auto-formatting and Automatic spelling checking makes your tasks easy. Writer is powerful enough to tackle desktop publishing tasks such as creating multi-column newsletters and brochures.
 
 <a title="Spreadsheet" href="http://www.libreoffice.org/features/calc/">CALC</a>is the spreadsheet inside LibreOffice. Analyze your data with Calc and then use it to present your final output. Charts and analysis tools help bring transparency to your conclusions. A fully-integrated help system makes easier work of entering complex formulas. Add data from external databases such as SQL or Oracle, then sort and filter them to produce statistical analyses. Use the graphing functions to display large number of 2D and 3D graphics from 13 categories, including line, area, bar, pie, X-Y, and net – with the dozens of variations available, you're sure to find one that suits your project.

<a title="Presentation" href="http://www.libreoffice.org/features/impress/">IMPRESS</a> is the fastest and easiest way to create effective multimedia presentations. It is similar to MS Powerpoint. Stunning animation and sensational special effects help you convince your audience. Create presentations that look even more professional than the standard presentations you commonly see at work.

<a title="Graphics editor" href="http://www.libreoffice.org/features/draw/">DRAW</a> lets you build diagrams and sketches from scratch. A picture is worth a thousand words, so why not try something simple with box and line diagrams? Or else go further and easily build dynamic 3D illustrations and special effects. It's as simple or as powerful as you want it to be.

<a title="Database engine" href="http://www.libreoffice.org/features/base/">BASE</a> is the database front-end of the LibreOffice suite. With Base, you can seamlessly integrate into your existing database structures. Based on imported and linked tables and queries from MySQL, PostgreSQL or Microsoft Access and many other data sources, you can build powerful databases containing forms, reports, views and queries. Full integration is possible with the in-built HSQL database.

<a title="Equation editor" href="http://www.libreoffice.org/features/math/">MATH</a> is a simple equation editor that lets you lay-out and display your mathematical, chemical, electrical or scientific equations quickly in standard written notation. Even the most-complex calculations can be understandable when displayed correctly. E=mc2.

LibreOffice is the free power-packed Open Source personal productivity suite for Windows, Macintosh and Linux. LibreOffice is the perfect choice for home users, businesses, government and other organizations. It's native file format is the ISO standardized ODF (Open Document Format), but LibreOffice can open and save Microsoft Word, PowerPoint and Excel files, as well as many other formats, bringing you the widest-available compatibility with other products.

LibreOffice - The Document foundation

Joeffice is the first open source office suite written in Java. Its features include Docking system. Visualize several documents in the same window, It can have a lot of documents open at the same time and easily switch from one to another. It works with Microsoft document formats (docx, xslx, pptx). It can get data through web services (RMI, SOAP, REST).

Joeffice - Office Written in Java

 Laravel Excel is a simple, but elegant Laravel wrapper around PhpSpreadsheet exports and imports. It supercharge your Laravel collections and export them directly to an Excel or CSV document. It can even export large dataset, Export queries with automatic chunking for better performance.

Laravel-Excel - Supercharged Excel exports in Laravel

ONLYOFFICE Desktop Editors is a free and open source office suite comprises text documents, spreadsheets and presentations allowing to create, view and edit documents of any size and complexity, to easily switch to the online mode for real-time co-editing and collaboration. Features as reviewing, commenting and chat are available as well. Deal with multiple files within one and the same window thanks to the tab-based user interface.
 
ONLYOFFICE Desktop Editors is fully compatible with MS Office and OpenDocument formats and allos you to work with most popular formats: DOC, DOCX, ODT, RTF, TXT, PDF, HTML, EPUB, XPS, DjVu, XLS, XLSX, ODS, CSV, PPT, PPTX, ODP.
 
The application also allows connecting third-party plugins, making it easy for developers to write their own extensions and add new features to the editors. Actually, you can create templates, add a video from YouTube, insert ClipArts, recognize text from screenshots/pictures, use photo editor, use Symbol Tabelle to insert special symbols, become multilingual with Yandex Translator or create your own one.
 
Desktop editors are a cross-platform solution available for Windows 10, 8.1, 8, 7, XP, Vista (x32 and x64), Debian, Ubuntu and other Linux distributions based on RPM, Mac OS 10.10 and newer. Besides platform-specific versions there is also a portable option.

ONLYOFFICE Desktop Editors is a free and open source office suite comprises text documents, spreadsheets and presentations allowing to create, view and edit documents of any size and complexity, to easily switch to the online mode for real-time co-editing and collaboration. Features as reviewing, commenting and chat are available as well. Deal with multiple files within one and the same window thanks to the tab-based user interface

ONLYOFFICE Desktop Editors - An office suite that combines text, spreadsheet and presentation editors allowing to create, view and edit local documents

WebSync is a document editing tool similar to Google Drive or Microsoft Skydrive. A limitation of Google Drive is not having a note taking application and a reason WebSync was created. WebSync makes up for this by providing a OneNote-esqe Notebook file type. It is a self hostable document editing tool. It has real time collaborative editing built in.

WebSync - Document editing tool similar to Google Drive or Microsoft Skydrive

Data grid inspired by MS Excel, provides sorting, paging, grouping, rows and cell selections, frozen rows, frozen columns, Add, delete, update, search, can display HTML, JSON, Array, XML, inline editing, virtual rendering, virtual scrolling, cross browser, cross platform, Themeroller ready with 24 ready to use themes.

ParamQuery grid is a lightweight jQuery grid plugin inspired by MS Excel and Google spreadsheet.

grid - jQuery grid plugin based on jQueryui widget design

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