Open Source C# Database Engines/Servers

Firebird RDBMS offers ANSI SQL features & runs on Linux, Windows & several Unix platforms. Features excellent concurrency & performance & powerful stored procedure & trigger language. More information and downloads at https://firebirdsql.org/, issue tracker is https://github.com/FirebirdSQL/firebird/issues

Duplicati is a free and open source backup client for securely storing your data. Duplicati stores encrypted, incremental, compressed backups on cloud storage services and remote file servers using AES-256 encryption, keeping your data safe and always updated. It works with most storage services, including Google Cloud and Drive, Amazon S3, Microsoft Azure and OneDrive, Dropbox, FTPOpenStack Storage (Swift), SSH (SFTP), WebDAV, Tencent Cloud Object Storage (COS), and more! Duplicati also works on all major platforms (Windows, Linux and OSX). Unlike many other backup solutions, Duplicati ensures that your data is stored securely far away and updated regularly. Incremental updates means it saves on bandwidth and storage space, with a scheduler that automatically keeps your backups up to date.

SQLite.org took over this project in 2010

db4o is the world's leading open source object database for Java and .NET. Leverage fast native object persistence, ACID transactions, query-by-example, S.O.D.A object query API, automatic class schema evolution, small size (http://developer.db4o.com)

Bitwarden Server is an open source project that contains all of the core infrastructure backend of all Bitwarden client applications. This includes APIs, database, Docker and other infrastructure items. Bitwarden is an open source password management solution that stores sensitive information in an encrypted vault. This project is written in C# using .NET Core with ASP.NET Core, while the database is written in T-SQL/SQL Server. Cross-platform, its codebase can be developed, built, run and deployed via Docker containers on Windows, macOS, and Linux distributions.

NeoDatis ODB is a new generation Object Oriented Database. ODB is a real native and transparent persistence layer for Java, .Net, Groovy, Scala and Google Android. ODB is very simple and very fast and comes with a powerful query language.

OpenVista(R) is the open-source version of VistA, an enterprise grade health care information system developed by the U.S. Veterans Affairs and deployed at 1,500 global facilities. OpenVista is a registered trademark of Medsphere Systems Corporation

Extra datalayers for YetAnotherForum >=1.9.x http://yetanotherforum.net created by vzrus.

Object-Relational Main-Memory Embedded Database system tightly integrated with C++ language. Use OS virtual mapping mechanism to access data. Provides subset of SQL language with OO extensions. Support of transactions, fault tolerance, replication.

A free simple ADO.NET compliant MySQL driver. Made in C# but it would be used in all .NET compatible languages.

A federated search application for discovering interesting files that are being shared online, such as video, music, books, software, games, subtitles and much more. All data is crawled by od-database which collects information about the contents of servers worldwide. We don't search file contents. We host no content, we provide only access to already available files in the same way Google and other search engines do.

Développement de MaNGOS en Français avec site internet et support technique.

Model driven code generation can improve coding standards, speed, quality of development and reduce your costs. From my experience generating code from XML using XSLT is one of the best and fastest solutions. This is just the base of the framework presenting the idea, any code template can be implemented upon request. Some sample generators are present for SQL / PLSQL / C# / AnsiC / Java The main target is to generate DTO/BDO/POJO objects based on the database definitions in multiple languages aligning all technologies used by a development team. If you are willing to contribute drop a message.

Simplified ADODB interface library for MySQL on Mono/.NET. The library can be used to port MS ADODB project to an Mono environment.

COMBuilder is a VB6 app that will allow you to write all COM objects for working with databases. Also, the program will create forms to work with this objects. It is planned to create also c# and vb.net code.

Cloud Target is a front-end to the python scripts that google uses to create, run and upload projects to its App Server system. This .NET application is based on the OSX front-end provided by Google in the SDK.

FlexibleTree is a data structure allowing arbitrary relationships and rules to be implemented easily. Primarily, FlexibleTree encourages more flexible data sorting in overlapping categories.

The JProgress project provides tools for connectivity with Java clients and the Progress database. JProgress provides an n-tier software architecture for database access for executing remote requests over WANs and the Internet.

Free software for MySQL servers and databases management.

Olation is a O/R Mapping and Persistence Framework for C# and VB.Net. You can map object to an Sql based database or map object to xml file by using Olation. One of the design goal is try to minimize the config.

Red/Black Tree implementation. Port of the sourceforge libredblack library to C#. The package also consists of mutlitree (tree with non-unique key) and tree with quick direct access to items by the index.

The SQL Embedded Manager, is a Windows Forms light-weight implementation of the Microsoft SQL Server Management Studio, focused to supporting only all the embedded databases engines (for example, Sql Server Compact Edition, SQLite and Firebird).

PT-BR: Tipo de Dados CPF/CNPJ para SQL Server, com custo máximo de 7 bytes para armazenamento, com propriedades/métodos de validação e formatação do campo. Compatível com SQL Server 2005, 2008, 2012, 2014 e 2016. EN-US: Brazilian Federal Registration Data Type for SQL Server. CPF = People. CNPJ = Companies. It has 7 bytes of maximum cost for storage, along with properties/methods of validation and field format. Compatible with SQL Server 2005, 2008, 2012, 2014 and 2016.

A porting kit to migrate databases to Bamboo Prevalence using strongly typed datasets (XSD).

fmDotNet is a .NET class to exchange data through FileMaker Server's web publishing engine. fmDotNet is written in C# using .NET 2.0. fmDotNet can be used in desktkop applications or on the web in ASP.NET pages with any .NET language (C#, VB.NET,...