Browse free open source C# Object Oriented Software and projects below. Use the toggles on the left to filter open source C# Object Oriented Software by OS, license, language, programming language, and project status.

  • Auth0 for AI Agents now in GA Icon
    Auth0 for AI Agents now in GA

    Ready to implement AI with confidence (without sacrificing security)?

    Connect your AI agents to apps and data more securely, give users control over the actions AI agents can perform and the data they can access, and enable human confirmation for critical agent actions.
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  • Incredable is the first DLT-secured platform that allows you to save time, eliminate errors, and ensure your organization is compliant all in one place. Icon
    Incredable is the first DLT-secured platform that allows you to save time, eliminate errors, and ensure your organization is compliant all in one place.

    For healthcare Providers and Facilities

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  • 1
    STD Foundation Classes

    STD Foundation Classes

    Object oriented frameworks - PowerBuilder, PowerServer & InfoMaker!

    by Chris Pollach (http://chrispollach.blogspot.ca) A fully integrated "object oriented" set of PB Classes for the following products: PowerBuilder, PowerClient & PowerServer. The framework greatly enhances the development process by making the PowerBuilder developer significantly more productive! License: https://sourceforge.net/projects/stdfndclass/files/License (Open Source) => Updated version of the STD "Integrated" framework 2025R1 build 2025.1.0.436 was released to production on 2025-06-09. https://sourceforge.net/projects/stdfndclass/files/FrameWork/Integrated => The STD "Web Service" framework 2022R2 build 2021.2.0.106 is the last release to production on 2021-05-12. This PB feature is now discontinued as of PB 2021 https://sourceforge.net/projects/stdfndclass/files/FrameWork/WebService => Updated version of the STD "Order Entry" example App 2025R1 build 2025.1.0.626 was released on 2025-05-29. https://sourceforge.net/projects/stdfndclass/files/Applications
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    Downloads: 7 This Week
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  • 2
    Castle aspires to simplify the development of enterprise and web applications. Offering a set of tools (working together or indepedently) and integration with other open source projects, Castle helps you get more done with less code.
    Downloads: 2 This Week
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  • 3
    Sort, filter and aggregate lists of business objects without all the boring code! This library provides a powerful "view" approach to data binding .NET objects to user interface controls.
    Downloads: 2 This Week
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  • 4
    AODL,a C# .net library for creating / editing documents in the OpenDocument Format ( ODF ). Requires no knowledge about the ODF XML schema itself. AODC, an OpenDocument Converter & Embed OpenOffice as .net Control
    Downloads: 3 This Week
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  • Cloud data warehouse to power your data-driven innovation Icon
    Cloud data warehouse to power your data-driven innovation

    BigQuery is a serverless and cost-effective enterprise data warehouse that works across clouds and scales with your data.

    BigQuery Studio provides a single, unified interface for all data practitioners of various coding skills to simplify analytics workflows from data ingestion and preparation to data exploration and visualization to ML model creation and use. It also allows you to use simple SQL to access Vertex AI foundational models directly inside BigQuery for text processing tasks, such as sentiment analysis, entity extraction, and many more without having to deal with specialized models.
    Try for free
  • 5
    Component (library, framework) refactoring may affect existing applications, where the client code used previous component versions. Our tool preserves applications binary-compatible by generating an adaptation layer out of change history.
    Downloads: 1 This Week
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  • 6
    NDO® (.NET Data Objects®) is a powerful tool for object relational mapping (O/R-Mapping) on the Microsoft® .NET Platform. It integrates smoothly in Visual Studio, using an Add-in. The latest version 3.0 works with .NET 4.0/4.5/4.5.1 and Visual Studio 2010/2012/2013/2015. Download and issue tracking has been moved to the NDO Website.
    Downloads: 0 This Week
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  • 7
    Class library to provide algorithmic functionality to collections. Some of the algorithms are: ForEach, Find, FindAll, Collect, etc.
    Downloads: 0 This Week
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  • 8
    Amber.net is a lightweight R/O mapper framework for .net, which easy database access without XML descriptors. It uses reflection and annotations for the CRUD cycle of c# objects. Amber.net is dot net version of original java version of Amber
    Downloads: 0 This Week
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  • 9
    AsyncControls is a total rewrite of the ASP.NET from the ground-up. It provides 30+ Ajax-Enabled ASP.NET server controls. Everything about AJAX is handled from the client-side to the server. No javascript, ever! Includes Ajax PageRepeater and Calendar.
    Downloads: 0 This Week
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  • Free and Open Source HR Software Icon
    Free and Open Source HR Software

    OrangeHRM provides a world-class HRIS experience and offers everything you and your team need to be that HR hero you know that you are.

    Give your HR team the tools they need to streamline administrative tasks, support employees, and make informed decisions with the OrangeHRM free and open source HR software.
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  • 10
    The Autonomous is a powerful framework to make autonomous class tests. With it you can make the autonomous objects with your operations, specify one behavior then start the process. The tests will be executed in linear, circular or aleatory way. Enjoy!
    Downloads: 0 This Week
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  • 11
    Object Relational Model (ORM) that's simple to implement.
    Downloads: 0 This Week
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  • 12
    C# Framework that implements the iRobot Roomba SCI spec. Also included is a diagnostic application named Roomba-Term that uses the framework. I invite you to use the Roomba-Term software as a tool & an example on how to program with the C# SCI
    Downloads: 0 This Week
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  • 13
    CLAM (Common Language Automation Machine) attempts to eliminate the rote mapping of data to objects that is prevalent in most modern development languages by breaking the bonds of relational data and providing a generic mechanism for retrieving data.
    Downloads: 0 This Week
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  • 14
    CSTL is a port of the C++ STL to C# 2.0 and .NET. The library utilizes C# generics, anonymous methods, and enumerable iterators, while alleviating some of C#'s deficiencies (no C++ templates, limited operator overloading, no C++ style iterators, etc).
    Downloads: 0 This Week
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  • 15
    CUAHSI water1flow web service 1.0 api provide programming interface for water1flow web services. Api will expose to .net, java, php, javascript etc programming language. Developed by Joe hu at MapWindow software lab,Idaho State University
    Downloads: 0 This Week
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  • 16
    A core framework based on .net technology to provide extended functionalities upon the standard .net framework. - Generic ORM engine (based on Emit) - High performance Cache impl - Lite Reflection.Emit framework - Collection Framework (proposed)
    Downloads: 0 This Week
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  • 17
    ClamAv# is a Mono language binding for the ClamAV virus scanner
    Downloads: 0 This Week
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  • 18
    Cooperator is on the one hand, a base class library for Object Relational Mapping, ORM, and by another one, a tool of code generation for for the MS.Net 2.0/3.0, using Business Objects and Stored Procedures. DAL, ORM, UOW, FACADE, MAPPER, MODELING ...
    Downloads: 0 This Week
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  • 19
    Core of a database access layer in .NET
    Downloads: 0 This Week
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  • 20
    DataQuicker is a data access layer framework. It helps us to cut down, accelerate development and decrease risks. It's more possible to provide our customers a perfect on-time project, and release us away from working over-time and delay.
    Downloads: 0 This Week
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  • 21
    .NET Assemblies that integrate and expands on various advanced solutions for DataBinding, Reflection, UI Wrapping and more. Fuel your .NET applications with RAD techniques and ready-to-use code that picks up where the .NET framework left off.
    Downloads: 0 This Week
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  • 22
    The aim of the project is to build up a set of components for enabling windows to dock into a designated form. Apart from this the main issue (and advantage) will be that every dockable window is handled like a common form in design-time. Language: C#
    Downloads: 0 This Week
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  • 23
    Domain Architect is a tool for 3-tier enterprise application code generation, a framework, and a set of practices provided as building blocks. (Related words: database script, O/R mapper, business object code generator, poco, enterprise applications)
    Downloads: 0 This Week
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  • 24
    EIDNative Library is a freeware SDK for Belgian Electronic ID Card. EIDNative Library includes native API for: * Microsoft .NET * Native Win32 * Visual Basic 6.0 and VBA * Java (only Windows platform)
    Downloads: 0 This Week
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  • 25
    Epic.NET
    Epic stands for "Entity Proxies with Injectable Components". It helps to keep your domain model implementation fully focused on the enterprise business, with an infrastructure ignorant fashion.
    Downloads: 0 This Week
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