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

  • $300 Free Credits for Your Google Cloud Projects Icon
    $300 Free Credits for Your Google Cloud Projects

    Start building on Google Cloud with $300 in free credits. No commitment, no credit card required until you're ready to scale.

    Launch your next project with $300 in free Google Cloud credits—no strings attached. Test, build, and deploy without risk. Use your credits across the entire Google Cloud platform to find what works best for your needs. After your credits are used, continue with always-free tier services. Only pay when you're ready to scale. Sign up in minutes and start exploring.
    Start Free Trial
  • Build Agents and Models on One Platform Icon
    Build Agents and Models on One Platform

    Everything you need to build production-ready agents and models. Access 200+ Google and third-party AI models and tools.

    Gemini Enterprise Agent Platform is Google Cloud's comprehensive platform for developers to build, scale, govern, and optimize agents and models. Choose from Google's most advanced models and third-party models like Anthropic's Claude Model Family.
    Try It Free
  • 1
    Clipper

    Clipper

    Polygon and line clipping and offsetting library (C++, C#, Delphi)

    This library is now obsolete and no longer being maintained. It has been superceded by my Clipper2 library - https://github.com/AngusJohnson/Clipper2.
    Leader badge
    Downloads: 7,476 This Week
    Last Update:
    See Project
  • 2
    Technical analysis library with indicators like ADX, MACD, RSI, Stochastic, TRIX... includes also candlestick pattern recognition. Useful for trading application developpers using either Excel, .NET, Mono, Java, Perl or C/C++.
    Leader badge
    Downloads: 7,728 This Week
    Last Update:
    See Project
  • 3
    Activation Key .NET Class Library

    Activation Key .NET Class Library

    Represents the activation key used to protect your C# application.

    A specific software-based key for a computer program C# source code. It certifies that the copy of the program is original. It is also called a license key, product key, product activation, software key and even a serial number. The key can be stored as a human readable text for easy transfering to the end user. Contains methods for generating the cryptography key based on the specified hardware and software binding. An additional feature is the ability to embed any information directly into the key. This information can be recovered as a byte array during key verifying.
    Downloads: 127 This Week
    Last Update:
    See Project
  • 4
    SimMetrics is a Similarity Metric Library, e.g. from edit distance's (Levenshtein, Gotoh, Jaro etc) to other metrics, (e.g Soundex, Chapman). Work provided by UK Sheffield University funded by (AKT) an IRC sponsored by EPSRC, grant number GR/N15764/01.
    Downloads: 2 This Week
    Last Update:
    See Project
  • MongoDB Atlas runs apps anywhere Icon
    MongoDB Atlas runs apps anywhere

    Deploy in 115+ regions with the modern database for every enterprise.

    MongoDB Atlas gives you the freedom to build and run modern applications anywhere—across AWS, Azure, and Google Cloud. With global availability in over 115 regions, Atlas lets you deploy close to your users, meet compliance needs, and scale with confidence across any geography.
    Start Free
  • 5
    Bipide - IDE para a Arquitetura dos Processadores BIP (BIP Processor IDE)
    Downloads: 2 This Week
    Last Update:
    See Project
  • 6
    Use, study and develop advanced digital halftoning algorithms with Halftone Laboratory, a GIMP plug-in backed by a highly modular and extensible library. It uses .NET/Mono and GIMP#.
    Downloads: 6 This Week
    Last Update:
    See Project
  • 7

    Switch

    Switch.

    Downloads: 6 This Week
    Last Update:
    See Project
  • 8
    DSP Lab

    DSP Lab

    Digital Signal Processing Simulation

    DSP Lab is a digital signal processing simulation application created to simulate and visualize process of sampling and filtering analog signal using DSP system. This application is created to provide as a tool for educator and student to visualize and understand DSP system. Source code is available at https://payhip.com/b/9mPY
    Downloads: 4 This Week
    Last Update:
    See Project
  • 9
    FileHelpers Library
    http://www.filehelpers.net The FileHelpers are an easy to use .NET library written in C#. Is designed to read/write data from flat files with fixed length or delimited records (CSV). Also has support to import/export data from different data storages (Excel, Access, SqlServer) Code on GitHub: https://github.com/MarcosMeli/FileHelpers
    Downloads: 1 This Week
    Last Update:
    See Project
  • Build Securely on AWS with Proven Frameworks Icon
    Build Securely on AWS with Proven Frameworks

    Lay a foundation for success with Tested Reference Architectures developed by Fortinet’s experts. Learn more in this white paper.

    Moving to the cloud brings new challenges. How can you manage a larger attack surface while ensuring great network performance? Turn to Fortinet’s Tested Reference Architectures, blueprints for designing and securing cloud environments built by cybersecurity experts. Learn more and explore use cases in this white paper.
    Download Now
  • 10
    To give users the full control over the running application. This means that an application is working according to its purpose but the control over the whole interface is taken from developer and given to users. While an application is running, users can move, resize, and tune all the screen objects through which the communication with an application is going. Set of files includes the book (both in DOC and PDF formats), a big demonstration project with all its files available (all the source files are in C#), and an additional description of many used classes. Book uses the examples from the demo project to explain everything in details. The examples are from many different areas. Examples from the first part of the book are aimed at the details of algorithm and its use with different objects; examples from the second part are mostly the real and very useful applications.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 11
    CognitionMaster

    CognitionMaster

    object-based image analysis framework

    Wienert S, Heim D, Kotani M, Lindequist B, Stenzinger A, Ishii M, Hufnagl P, Beil M, Dietel M, Denkert C, Klauschen F. CognitionMaster: an object-based image analysis framework. Diagn Pathol 2013, 8:34
    Downloads: 3 This Week
    Last Update:
    See Project
  • 12
    Many people love programming contests. There are tons of contests or online judges like TopCoder, UVA, SPOJ, etc. This project's goal is to store and keep track of what a programmer have done and studied so far.
    Downloads: 2 This Week
    Last Update:
    See Project
  • 13
    Gemi

    Gemi

    PCR primers / probes design from multiple & degenerate sequences

    Gemi, an automated, fast, and easy-to-use bioinformatics tool with a user-friendly interface to design primers and probes for polymerase chain reaction (PCR). Gemi accepts multiple aligned and long DNA and RNA sequences with degenerate nucleotide (non-A/C/G/T bases). Gemi can be used for quantitative, real-time and conventional PCR (qPCR, rt-PCR, etc.), and Sanger sequencing. Gemi can parse large dataset of sequences efficiently. Python source code is available upon request. Milestone: The tool reached about 3000 downloads sine 2012. Article Gemi: PCR primers prediction from multiple alignments. Comparative and functional genomics 2012 PMID: https://www.ncbi.nlm.nih.gov/pubmed/23316117 A great review on designing primer, Gemi, and other tools: Designing degenerate primers: Overview, challenges, and computational methods. Methods in Microbiology. Vol 57, 2025, Pages 73-89; DOI: 10.1016/bs.mim.2025.01.002
    Downloads: 2 This Week
    Last Update:
    See Project
  • 14

    JScriptCompiler

    JScript Compiler or Interpreter

    The class 'JSEvaluator' in this project allows us to interpret expressions in JScript, allowing us to use parameters in the server at runtime. For example: ({@ 1} + {@ 2}) / 100; Parameter {@ 1} : 36 Parameter {@ 2}: 45 Result of the expression: 0.81
    Downloads: 2 This Week
    Last Update:
    See Project
  • 15
    KND Decoder
    Der KND Decoder konvertiert die lästigen Zahlenwerte, in den Java Dateien vom Knuddels Applet, zu lesbaren Strings. Die neue dekodier Methode wurde auch beachtet, die den HuffmanString etc. konvertiert.
    Downloads: 2 This Week
    Last Update:
    See Project
  • 16

    Math Tools

    Provides useful mathematical tools which make your work much easier.

    Math Tools provides mathematical tools, allows you to calculate triangle propeties, and find both parametric and algebraic forms of planes. ------ More Tools Will be Added in The Future ------ ------ Translation to english will be completed soon ------
    Downloads: 2 This Week
    Last Update:
    See Project
  • 17
    Esta é a documentação de um projeto de conclusão de curso feito na conclusão do curso de Engenharia de Computação-UNIVALI.É um conjunto de arquivos C e Matlab contendo a implementação da Lógica Fuzzy e simulações em sistema de enegia.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 18
    Software to build database of all best solution of all configurations of Cube21/Square1 Silver edition puzzle cube. Also 3D UI is provided.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 19
    Game Toolbox is a C# assembly designed to facilitate the creation of games and game prototypes. It contains no graphics code, does not depend on XNA, and is Mono-compatible. It provides implementations of A*, GOAP, a genetic algorithm, and more.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 20
    This site hosts the source code for C++ version of the Broker for SBW, NOM module, advanced simulation suite, analysis applications and model editors.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 21
    WPF Code Generator

    WPF Code Generator

    Word List Generator for Windows

    This a .net 4.5 WPF application that generates word lists, similar to crunch for linux. Just one nifty multi-threaded dictionary / code / word - list generator. It is a permutation combination engine, so it is perfect for brute force activities. Please show your appreciation and leave a review or comment, so I can find the motivation to improve it.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 22
    This CPU Benchmark is written in .NET C# and use the Linpack and Whetstone algorithm.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 23
    A .NET Library written in C# 2.0 for doing some mathematic operations as evaluating functions, plotting or finding roots. Visit the Project Web site at http://math-net.sourceforge.net.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 24
    a framework library with a template method interface and inheritable classes for an executable process design which produces an executable which is both a GUI and a console application. It provides multi-threading for work items of the provider process .
    Downloads: 0 This Week
    Last Update:
    See Project
  • 25
    ARMR provides a foundation for creating an efficient in-memory database. Its unique list processing structures simplify programming logic and allow the developer to rapidly sort, group, and select data. Give your app a hypercard like capability.
    Downloads: 0 This Week
    Last Update:
    See Project
Monday.com Logo