My favorites .Net development toolkits
Toolbox
Infrastructure
Useful web infrastructure (some are free)
- Rabbit MQ - Rabbit MQ is a scalable message/queue AMQP server with WCF/C# client (free)
- Twillio - This is an awesome commercial programmable VOIP infrastructure. Free accounts available (commercial)
- ejabberd - This is one really scalable jabber/XMPP server (free)
- fyiReporting - This is a free reporting tools for .Net based on Report Definition Langauge (RDL) (free)
- Dotnet OpenID - C# library for OpenID authentication (free)
- Tweetsharp - An excellent library for Tweeter API (free)
- XML-RPC.Net - This is *the* library to make XML-RPC calls (free)
- Jabber-net - This is the only client library for Jabber/XMPP protocol
- Mono RelaxNG Validator - This is the most viable RelaxNG validator reader for .Net (free)
- Quartz. Net - Enterprise job scheduler for .Net (free)
- Topshelf - Windows service application framework (free)
- Facebook Developer Toolkit - If you want to develop a Facebook App on .Net, use this (free)
- Gitsharp - Library for Git version control (free)
- SharpSVN - A library for Subversion Client API (free)
- Math.NET - A mathematical open source (MIT/X11, LGPL & GPL) library written in C#/.Net, aiming to provide a self contained clean framework for symbolic algebraic and numerical / scientific computations. (free)
- Linq to Twitter - Linq to Twitter
- Sharp SSH - SSH Implementation in C#
Workflow
Workflow system you can use for your applications
- Simple State Machine - his is a powerful and simple open source workflow system driven by Boo DSL (free)
- Stateless - State machine framework for C#
Open Source Web Application
Useful open source web application written using .Net technologies
- Simple Kanban - This is a simple javascript based tool to create your kanban board based on a single html file
Design Tools
Free tools to help you during design
- Balsamiq - Bar none the most developer friendly UI sketch tools available (commercial)
- yUML - Produce beautiful UML diagram fast (free)
- Web Sequence Diagrams - Draw UML web sequence diagram quickly (free)
- Spec Explorer - An awesome model based testing tool from Microsoft Research
RDF
RDF Libraries
Scripting
Scripting languages for .Net
- Iron Python - A fast implementationo of Python language on DLR (free)
- Iron Ruby - A fast implementation of Ruby language on .Net (free)
- RemObjects ECMAScript - A DLR based implementation of JavaScript language (free)
- LuaSharp - Use Lua language on .Net (free)
- Iron Scheme - a DLR based implementation of Scheme language (free)
- Boo - It's not exactly a scripting language, but an awesome language nevertheless (free)
Serializers
Libraries to serialize your data to open format
- Json.NET - An excellent JSON serializer (free)
- Yaxlib - If you find the default .Net or WCF XML Serializers too retarded for you, check this awesome library (free)
- Yaml Serializer - A YAML 1.2 serializer
Database
Libraries to connect to relational or nosql database
- System.Data.SQLite - This is the one library to use to connect to SQLite database (free)
- Firebird .Net Data Provider - Firebird is an awesome open source database. Use this library to connect to it from .Net (free)
- Divan - This is a c# library for CouchDB
- Manage ESENT - Powerful and fast built in database in Windows
Service Bus
.Net based service bus for your enterprise application
- nservicebus - This is an excellent service bus library (free)
- masstransit - If nservicebus is not your cup of tea, try this one (free)
REST Framework
REST Application Framework
- Open Rasta - This is a unique open source REST framework for .Net. Highly recommended (free)
- REST for ASP.Net MVC SDK - REST programming support based on ASP.Net MVC framework (free)
- RestSharp - this is a new kind of the block (free)
- Dream - I use it and love it for its simplicity and brilliant async framework (free)
ORM
Excellent ORM for your application
- Subsonic - A productive open source ORM (free)
- NHibernate - This is the oldest and very popular port of Hibernate ORM (free)
- LLBLGen Pro - This is the most awesome ORM for .Net available out there (commercial)
Template Engine
Text template engine
- ndjango - a .Net implementation of Django template engine (free)
- String Template - This is a powerful template engine (free)
Unit Test
Unit Test tools
- NUnit - The oldest .Net unit testing library (free)
- MbUnit - This unit test is compatible with NUnit attribute but also introduces boatloads of testing features (free)
- smtp4dev - Dummy SMTP server that sits in the system tray and does not deliver the received messages. (free)
- Spec Flow - This is a library for BDD (similar to cucumber)
- mspec - This is yet another BDD framework (similar to specflow)
Dependency Injection
DI tools
- ninject - An easy to use DI tool (free)
- Structure Map - I know some people that swear by this (free)
Mocking
Mocking libraries
- moq - An easy to use mocking library (free)
- Rhino.Mocks - One of the most popular mocking library for .Net (free)
Syndication
RSS/ATOM libraries
- Argotic - Supports RSS, ATOM and various syndication format (free)
Javascript Libraries
RSS/ATOM libraries
- wireit - An open source javascript library to create wireable interface (free)