FastReport.DataVisualization by: Fast Reports Inc.

Charting library

FluentValidation by: Jeremy Skinner

A validation library for .NET that uses a fluent interface to construct strongly-typed validation rules.

FluentFTP by: Robin Rodricks FluentFTP Contributors

An FTP and FTPS client for .NET & .NET Standard, optimized for speed. Provides extensive FTP commands, File uploads/downloads, SSL/TLS connections, Directory listing parsing, File hashing/checksums, File permissions/CHMOD, FTP proxies, FXP transfers, UTF-8 support, Async/await support, Powershell support and more. Written entirely in C#, with no external dependencies.

FastMember by: Marc Gravell

In .NET reflection is slow... well, kinda slow. If you need access to the members of an arbitrary type, with the type and member-names known only at runtime - then it is frankly hard (especially for DLR types). This library makes such access easy and fast.

FastReport.Core.Skia.Demo by: Fast Reports Inc.

FastReport.Core — is a full-featured reporting solution for .NET. It contains: - visual designer; - connection to 20+ databases; - export to 45 data formats; - support for SQL queries; - dialogue forms; - 40 types of barcodes; - geographic maps; - support for 48 languages; - integration into cloud services. FastReport.Core works with ADO .NET data sources. It supports data sorting and filtering, master-detail relationships. Everything can be configured with a few mouse clicks. Connect to ADO, MS SQL, XML databases or get information from IEnumerable type business objects. FastReport.Core supports exporting to various popular formats such as PDF, RTF, XLS, XML, DOCX, TXT, CSV, PowerPoint, HTML, MHT, XPS, JPEG, BMP, TIFF, PNG, Open Document Format (ODT, ODS, ODP), XAML, Scalable Vector Graphics (SVG), DBF, PPML and so on. The full version of the package is available in FastReport .NET at https://www.fast-report.com/en/fast-report-net-editions-compare/

FastReport.Web.Skia by: Fast Reports Inc.

FastReport .NET is a full-featured reporting solution for .Net Core. Various report objects will allow your report to look exactly how you want it to: 13 types of bands, 25 types of barcodes, table object, diagram, maps, shapes, line, PolyLine, Polygon and many more. FastReport .NET supports export to various popular formats, such as PDF/A, Excel, Word, Open Office, HTML, CSV, Json, XAML, ZPL, etc. This package includes Razor components for Blazor Server. Located in FastReport.Web.Blazor.Components namespace and available in .NET Core 3.1+.

FastReport.Web.Skia.Demo by: Fast Reports Inc.

FastReport .NET is a full-featured reporting library for .NET, .NET Core, Blazor, ASP.NET, MVC, and Windows Forms. It can be used in Microsoft Visual Studio and JetBrains Rider. With FastReport .NET, you can create application-independent .NET reports. In other words, FastReport .NET can be used as a standalone reporting tool. - Includes powerful visual report designer for creating and modifying the reports. Your application can run the designer from the code. - Includes online report designer for ASP.NET (only in Enterprise edition). - Connect to any database, use any of its tables or create queries. - Add dialogue form(s) to your report to prompt for parameters before running a report. - Using built-in script you can manage the interactions with dialogue form controls and perform complex data handling. - Finally, view the result and print or export it to many common document formats. This package includes Razor components for Blazor Server. Located in FastReport.Web.Blazor.Components namespace. The full version of the package is available in FastReport .NET at https://www.fast-report.com/en/product/fast-report-net/

FastReport.Core by: Fast Reports Inc.

FastReport.Core — is a full-featured reporting solution for .NET and .NET Framework. It contains: - visual designer; - connection to 20+ databases; - export to 45 data formats; - support for SQL queries; - dialogue forms; - 40 types of barcodes; - geographic maps; - support for 48 languages; - integration into cloud services. FastReport.Core works with ADO .NET data sources. It supports data sorting and filtering, master-detail relationships. Everything can be configured with a few mouse clicks. Connect to ADO, MS SQL, XML databases or get information from IEnumerable type business objects. FastReport.Core supports exporting to various popular formats such as PDF, RTF, XLS, XML, DOCX, TXT, CSV, PowerPoint, HTML, MHT, XPS, JPEG, BMP, TIFF, PNG, Open Document Format (ODT, ODS, ODP), XAML, Scalable Vector Graphics (SVG), DBF, PPML and so on. The full version of the package is available in FastReport .NET at https://www.fast-report.com/en/fast-report-net-editions-compare/

FFmpeg.AutoGen by: Ruslan Balanukhin

FFmpeg auto generated unsafe bindings for C#/.NET and Mono.

Fleck by: statenjason

C# WebSocket Implementation

Flurl.Http by: Todd Menier

A fluent, portable, testable HTTP client library.

FastReport.Web by: Fast Reports Inc.

FastReport .NET is a full-featured reporting library for .NET, .NET Core, Blazor, ASP.NET, MVC, and Windows Forms. It can be used in Microsoft Visual Studio and JetBrains Rider. With FastReport .NET, you can create application-independent .NET reports. In other words, FastReport .NET can be used as a standalone reporting tool. - Includes powerful visual report designer for creating and modifying the reports. Your application can run the designer from the code. - Includes online report designer for ASP.NET (only in Enterprise edition). - Connect to any database, use any of its tables or create queries. - Add dialogue form(s) to your report to prompt for parameters before running a report. - Using built-in script you can manage the interactions with dialogue form controls and perform complex data handling. - Finally, view the result and print or export it to many common document formats. This package includes Razor components for Blazor Server. Located in FastReport.Web.Blazor.Components namespace. The full version of the package is available in FastReport .NET at https://www.fast-report.com/en/product/fast-report-net/

FastReport.Compat by: Fast Reports Inc.

Common compatible types for FastReport .Net, Core and Mono

FastMember.Signed by: Marc Gravell

In .NET reflection is slow... well, kinda slow. If you need access to the members of an arbitrary type, with the type and member-names known only at runtime - then it is frankly hard (especially for DLR types). This library makes such access easy and fast.

Flurl by: Todd Menier

A fluent, portable URL builder. To make HTTP calls off the fluent chain, check out Flurl.Http.

FluentNHibernate by: James Gregory and contributors

Fluent, XML-less, compile safe, automated, convention-based mappings for NHibernate.

FluentAssertions by: Dennis Doomen Jonas Nyrup Xceed

A very extensive set of extension methods that allow you to more naturally specify the expected outcome of a TDD or BDD-style unit tests. Works with .NET Standard 2.0 and higher, .NET Framework 4.7 and higher and .NET 6 and higher. Supports the unit test frameworks MSTest2, NUnit3, NUnit4, XUnit2, XUnit3, MSpec and TUnit. IMPORTANT: This version is free for open-source projects and non-commercial use, but commercial use requires [a paid license](https://xceed.com/products/unit-testing/fluent-assertions/). Check out the [license page](LICENSE) for more information.

FastReport.Core.Skia by: Fast Reports Inc.

FastReport.Core.Skia is a full-featured reporting solution for .Net Core and .Net Framework. Various report objects will allow your report to look exactly how you want it to: 13 types of bands, 25 types of barcodes, table object, diagram, maps, shapes, line, PolyLine, Polygon and many more. FastReport.Core supports export to various popular formats, such as PDF/A, Excel, Word, Open Office, HTML, CSV, Json, XAML, ZPL, etc.

FastExpressionCompiler.src by: Maksim Volkau

FastExpressionCompiler is 10-40x times faster than Expression.Compile()

FirebirdSql.Data.FirebirdClient by: FirebirdSQL

Firebird ADO.NET Data provider