Stef.Validation by: Stef Heyenrath

Argument validation like: Guard.NotNull, Guard.NotNullOrEmpty, Guard.NotNullOrWhiteSpace, Guard.Condition en Guard.HasNoNulls.

StreamJsonRpc by: Microsoft

A cross-platform .NET portable library that implements the JSON-RPC wire protocol and can use System.IO.Stream or WebSocket so you can use it with any transport.

Stubble.Core by: Alex McAuliffe

Trimmed down {{mustache}} templates in .NET

StyleCop.Analyzers by: Sam Harwell et. al.

An implementation of StyleCop's rules using Roslyn analyzers and code fixes

StyleCop.Analyzers.Unstable by: Sam Harwell et. al.

An implementation of StyleCop's rules using Roslyn analyzers and code fixes

Superpower by: Datalust, Superpower Contributors, Sprache Contributors

A parser combinator library for C#

Swashbuckle.AspNetCore by: domaindrivendev

Swagger tools for documenting APIs built on ASP.NET Core

Swashbuckle.AspNetCore.Swagger by: Swashbuckle.AspNetCore.Swagger

Middleware to expose Swagger JSON endpoints from API's built on ASP.NET Core

Swashbuckle.AspNetCore.SwaggerGen by: Swashbuckle.AspNetCore.SwaggerGen

Swagger Generator for API's built on ASP.NET Core

Swashbuckle.AspNetCore.SwaggerUI by: Swashbuckle.AspNetCore.SwaggerUI

Middleware to expose an embedded version of the swagger-ui 3 from an ASP.NET Core application

Syncfusion.Blazor by: Syncfusion Inc.

This package provides 90+ Syncfusion® Blazor native components that work seamlessly with Blazor Web Apps (Server, WebAssembly, and Auto Modes), as well as Standalone WebAssembly and Server projects.

Syncfusion.Blazor.Buttons by: Syncfusion Inc.

Provides Syncfusion® Blazor UI components including Button, Checkbox, RadioButton, Chips, Switch, Floating Action Button, SpeedDial, and Icons. Designed for building interactive user interfaces with support for Blazor Server and Blazor WebAssembly.

Syncfusion.Blazor.Calendars by: Syncfusion Inc.

Provides Syncfusion® Blazor calendar and date/time picker components for building date selection interfaces. Includes Calendar, DatePicker, DateRangePicker, DateTimePicker, and TimePicker with support for localization, custom formatting, and date range validation.

Syncfusion.Blazor.Charts by: Syncfusion Inc.

This package contains the Syncfusion® Blazor Charts components.

Syncfusion.Blazor.Core by: Syncfusion Inc.

Syncfusion® Blazor Core Library provides base components, utilities, and interfaces used across Syncfusion Blazor UI components. Compatible with Blazor Server and Blazor WebAssembly.

Syncfusion.Blazor.Data by: Syncfusion Inc.

Syncfusion® Blazor DataManager component for managing data operations in Blazor applications. Provides features for data binding, CRUD operations, sorting, filtering, grouping, and paging with support for local and remote data sources.

Syncfusion.Blazor.DropDowns by: Syncfusion Inc.

Provides Syncfusion® Blazor dropdown and selection components including AutoComplete, ComboBox, DropDownList, ListBox, and MultiSelect controls. Supports data binding, filtering, grouping, cascading, templates, and accessibility features for building robust selection interfaces.

Syncfusion.Blazor.Grid by: Syncfusion Inc.

Syncfusion® Blazor DataGrid component for rendering high-performance, feature-rich tabular UI in .NET Blazor applications. Includes virtualization, paging, sorting, filtering, grouping, editing, templates, and export (Excel/PDF).

Syncfusion.Blazor.InPlaceEditor by: Syncfusion Inc.

Provides a Syncfusion® Blazor In-Place Editor component for inline and popup editing scenarios. Supports multiple input types including TextBox, Dropdown, DatePicker, and Rich Text Editor. Optimized for seamless integration in both Blazor Server and Blazor WebAssembly applications.

Syncfusion.Blazor.Inputs by: Syncfusion Inc.

Comprehensive Blazor Syncfusion® input components including TextBox, MaskedTextBox, NumericTextBox, Color Picker, File Upload, Slider, Rating, Signature, OTP Input, and Speech To Text. Features data validation, formatting, keyboard navigation, and accessibility support for .NET 8+.