TeamLab is a platform for business collaboration and project management. Its features include Project management,  Tasks management, Reports, Events, Blogs, Forums, Bookmarks, Wiki, Instant Messenger, Document Management, CRM and more.

Teamlab - Business Collaboration and Project Management in ASP.NET

JsonFx v2.0 - JSON serialization framework for .NET. It has unified interface for reading / writing JSON, BSON, XML, JsonML. It implements LINQ-to-JSON, Supports reading/writing using DataContract, XmlSerialization, JsonName, attributes and lot more.

JsonFx.NET - JSON serialization framework for .NET

The MongoDB C# Driver is the 10gen-supported C# / .NET driver for MongoDB.

MangoDB CSharp Driver

The Accord.NET project provides machine learning, statistics, artificial intelligence, computer vision and image processing methods to .NET. It can be used on Microsoft Windows, Xamarin, Unity3D, Windows Store applications, Linux or mobile.
 
After merging with the AForge.NET project, the framework now offers a unified API for learning/training machine learning models that is both easy to use and extensible. 
 
It supports Vector Machines , Logistic Regression , Decision Trees , Neural Networks , Deep Learning (Deep Neural Networks), Levenberg-Marquardt with Bayesian Regularization , Restricted Boltzmann Machines , Sequence classification , Hidden Markov Classifiers and Hidden Conditional Random Fields, Multiple linear regression , Multivariate linear regression , polynomial regression , logarithmic regression.
 
 Clustering algorithms like K-Means , K-Modes , Mean-Shift , Gaussian Mixture Models , Binary Split, Image processing, Load, parse, save, filter and transform audio signals, Real-time face detection and tracking , as well as general methods for detecting , tracking and transforming objects in image streams and lot more.

The Accord.NET project provides machine learning, statistics, artificial intelligence, computer vision and image processing methods to .NET. It can be used on Microsoft Windows, Xamarin, Unity3D, Windows Store applications, Linux or mobile.

Accord.NET - Machine learning, Computer vision, Statistics and general scientific computing for .NET

SparkleShare is a file sharing and collaboration app. It works just like Dropbox, and you can run it on your own server. It creates a special folder on your computer. You can add remotely hosted folders (or "projects") to this folder. These projects will be automatically kept in sync with both the host and all of your peers when someone adds, removes or edits a file.



SparkleShare - Self hosted, Secure, Instant file sync, Dropbox alternative

Cake (C# Make) is a build automation system with a C# DSL to do things like compiling code, copy files/folders, running unit tests, compress files and build NuGet packages. Cake is built on top of the Roslyn compiler which enables you to write your build scripts in C#. It supports the most common tools used during builds such as MSBuild, MSTest, xUnit, NUnit, NuGet, ILMerge, WiX and SignTool out of the box. 

Cake - (C# Make) is a cross platform build automation system

The Microsoft Bot Framework provides just what you need to build and connect intelligent bots that interact naturally wherever your users are talking, from text/sms to Skype, Slack, Office 365 mail and other popular services.The Microsoft Bot Builder SDK is one of three main components of the Microsoft Bot Framework. It is a powerful, easy-to-use framework that provides a familiar way for .NET and Node.js developers to develop bots. 
 
The Bot Builder SDK provides features that make interactions between bots and users much simpler. Bot Builder also includes an emulator for debugging your bots, as well as a large set of sample bots you can use as building blocks.

The Microsoft Bot Framework provides just what you need to build and connect intelligent bots that interact naturally wherever your users are talking, from text/sms to Skype, Slack, Office 365 mail and other popular services.The Microsoft Bot Builder SDK is one of three main components of the Microsoft Bot Framework. It is a powerful, easy-to-use framework that provides a familiar way for .NET and Node.js developers to develop bots. 

BotBuilder - The Microsoft Bot Builder SDK is one of three main components of the Microsoft Bot Framework

The Marten library provides .NET developers with the ability to use the proven PostgreSQL database engine and its fantastic JSON support as a fully fledged document database. The Marten team believes that a document database has far reaching benefits for developer productivity over relational databases with or without an ORM tool.Marten also provides .NET developers with an ACID-compliant event store with user-defined projections against event streams.

Marten - Postgresql as a Document Database and Event Store for .Net Applications

xUnit.net is a free, open source, community-focused unit testing tool for the .NET Framework. Written by the original inventor of NUnit v2, xUnit.net is the latest technology for unit testing C#, F#, VB.NET and other .NET languages. xUnit.net works with ReSharper, CodeRush, TestDriven.NET and Xamarin. It is part of the .NET Foundation, and operates under their code of conduct. 

xUnit - Unit testing tool for the .NET Framework

Quasar is a fast and light-weight remote administration tool coded in C#. The usage ranges from user support through day-to-day administrative work to employee monitoring. Providing high stability and an easy-to-use user interface, Quasar is the perfect remote administration solution for you.

Quasar - Remote Administration Tool for Windows

nopCommerce is the best open-source eCommerce shopping cart solution. nopCommerce is free, and it is the most popular ASP.NET eCommerce platform. nopCommerce supports a mobile version of your website with a compelling, feature-rich and graphically pleasing storefront, and it provides means for retailers to immediately deliver relevant offers, promotions and products. Its feature include Multi store, Multi vendor, SEO, Payment methods, Shipping methods, Tax features, Marketing, Stock management and lot more.

nopCommerce - The most popular open-source eCommerce shopping cart solution based on ASP.NET Core 

The WiX Toolset lets developers create installers for Windows Installer, the Windows installation engine.
The core of WiX is a set of build tools that build Windows Installer packages using the same build concepts as the rest of your product: source code is compiled and then linked to create executables; in this case .exe setup bundles, .msi installation packages, .msm merge modules, and .msp patches. The WiX command-line build tools work with any automated build system. Also, MSBuild is supported from the command line, Visual Studio, and common CI/CD build systems like GitHub Actions.
WiX includes several extensions that offer functionality beyond that of Windows Installer. For example, WiX can install IIS web sites, create SQL Server databases, and register exceptions in the Windows Firewall, among others.
With Burn, the WiX bootstrapper, you can create setup bundles that install prerequisites like the .NET Framework and other runtimes along with your own product. Burn lets you download packages or combine them into a single downloadable .exe.
The WiX SDK includes managed and native libraries that make it easier to write code that works with Windows Installer, including custom actions in both C# and C++.

The Windows Installer XML (WiX) is a toolset that builds Windows installation packages from XML source code. The toolset supports a command line environment that developers may integrate into their build processes to build MSI and MSM setup packages.

WiX Toolset - Toolset to create Windows Installer

Quartz.NET is a full-featured, open source job scheduling system that can be used from smallest apps to large scale enterprise systems. It is a port of very propular open source Java job scheduling framework, Quartz. Its feature include:
 <UL>
	<LI>Can run as embedded, standalone.</LI>
	<LI>Job scheduling</LI>
	<LI>Job Execution</LI>
	<LI>Job Persistence</LI>
	<LI>Clustering</LI>
	<LI>Listeners & Plug-Ins</LI>
 </UL>

Quartz.NET is a full-featured, open source job scheduling system that can be used from smallest apps to large scale enterprise systems. It is a port of very propular open source Java job scheduling framework, Quartz.

Quartz.NET

AnkhSVN is a Subversion Source Control Provider for Microsoft Visual Studio 2005, 2008 and 2010. AnkhSVN provides source code management support to all project types supported by Visual Studio and allows you to perform the most common version control operations directly from inside the Microsoft Visual Studio IDE. The Pending Changes dashboard gives you a unique insight in your development process and provides easy access to the source code and issue management features. The deep source code control (SCC) integration allows you to focus on developing, while AnkhSVN keeps track of all your changes and provides you the tools to effectively handle your specific needs. AnkhSVN 2.0 supports Visual Studio 2005, Visual Studio 2008 and Visual Studio 2010. Its features include:
 <UL>
	<LI>Pending Changes window</LI>
	<LI>Merge Tracking</LI>
	<LI>Optimized workflow</LI>
	<LI>Pluggable diff/merge</LI>
	<LI>Repository Explorer</LI>
 </UL>

AnkhSVN is a Subversion Source Control Provider for Microsoft Visual Studio 2005, 2008 and 2010. AnkhSVN provides source code management support to all project types supported by Visual Studio and allows you to perform the most common version control operations directly from inside the Microsoft Visual Studio IDE.

Ankhsvn

NHibernate is a mature, open source object-relational mapper for the .NET framework. NHibernate is a port of Hibernate Core for Java to the .NET Framework. It handles persisting plain .NET objects to and from an underlying relational database. NHibernate supports transparent persistence, your object classes don't have to follow a restrictive programming model. Persistent classes do not need to implement any interface or inherit from a special base class. This makes it possible to design the business logic using plain .NET (CLR) objects and object-oriented idiom. Full Text Search. Cluster-scoped caching with Microsoft Velocity & Memcached. Business validation rules. ReSharper plugin. Castle Active Record. S#arp Architecture. And many more... 
 <UL><li>Natural programming model - NHibernate supports natural OO idiom; inheritance, polymorphism, composition and the .NET collections framework, including generic collections.</li></ul><ul style="text-align: justify;"><li>Native .NET - NHibernate API uses .NET conventions and idioms</li></ul><ul style="text-align: justify;"><li>Support for fine-grained object models - a rich variety of mappings for collections and dependent objects</li></ul><ul style="text-align: justify;"><li>No build-time bytecode enhancement - there's no extra code generation or bytecode processing steps in your build procedure</li></ul><ul style="text-align: justify;"><li>The query options - NHibernate addresses both sides of the problem; not only how to get objects into the database, but also how to get them out again</li></ul><ul style="text-align: justify;"><li>Custom SQL - specify the exact SQL that NHibernate should use to persist your objects. Stored procedures are supported on Microsoft SQL Server.</li></ul><ul style="text-align: justify;"><li>Support for "conversations" - NHibernate supports long-lived persistence contexts, detach/reattach of objects, and takes care of optimistic locking automatically</li></ul><ul style="text-align: justify;"></ul>

NHibernate is a mature, open source object-relational mapper for the .NET framework. NHibernate is a port of Hibernate Core for Java to the .NET Framework. It handles persisting plain .NET objects to and from an underlying relational database.

NHibernate - object-relational mapper for .NET

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