Open Source C# Database Engines/Servers for Linux

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.

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.

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

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.

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.

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

dotLucene/Lucene.Net is the .NET implementation of the Lucene full-text search engine library. Lucene.Net is now under ASF. It's new home is located here: http://incubator.apache.org/projects/lucene.net.html.

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

ADP - Advanced Data Provider - is a transparent factory for ADO.NET which loads providers dynamically. It is written in C# and works on .NET, Portable.NET and Mono on Linux, Windows and MacOSX.

AhMeBa is an XML file-based metabase engine. It targets small data driven applications that don't require a powerfull database engine or need a light, mobile database such as personal websites and small bussiness applications.

Aristotle is an active training simulation that is capable of dynamically and adaptively training any subject in any language using the learners own personality traits and learning modality. This project is currently being developed in PHP/MySQL.

Encode/Decode library to/from Basic Encoding Rules (BER) of ASN.1 written in Visual Basic .Net. Useful to implement any protocol that uses BER (LDAP, SNMP, etc.).

BearDB is a database provider for modern web applications and javascript frameworks. BearDB is our Relational Database System which runs on most platforms and supports multiple programming languages. A REST server allows web applications to go directly to the database. BigBear is our Large Scale Database System which supports SQL. BigBear is similar to modern distributed NoSQL database systems, with the addition of support for SQL and a REST server.

Provides a .NET 2.0 interface for the Berkeley DB database engine. Written in C#, but accessible to other CLS-compliant languages as well.

CSDerby is not CloudScape-Derby(for Java) but rather Derby forked/ported to CSharp. Specifically it is intended to be a native c# Embedded DB for the mono/net platform with the ADO.NET API instead of the JDBC API.

NoSQL CSV Open Storage Database System

DBLX 3.3 is available! DBLX is a multi-user, client-server relational database. DBLX uses standard SQL and has many types of clients, and client API's. DBLX has a REST server to allow direct access from web applications. The design goals of DBLX are to produce a very fast database which can be used with standard ANSI sql. DBLX source code is available in C# and Java. DBLX includes the server component, a command-line client, as well as client APIs. DBLX is well-documented so that you can just get the database, drop it on to your favorite system and start using it immediately. Go to the Discussion section to read the latest on DBLX!

EmGeeGen is a server-client information distribution system, tailored for use with the EmGee role playing system (though the theoretical platform should be useful for a variety of tasks).

Generic Object Oriented Database System Distributed thick-client OODBMS using aspect-oriented approach to build transparent interface to database from OO programming languages (C++, Java, C#)

Jaguar is highly loaded, distributed and easily scalable search engine. Main parts: NoSQL database server, Сommunication Queue server, multi-threaded Scanner and Analyzer services, Management tool.

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.

Easy and ready-to-use set of .Net Classes to implement LDAP applications (Servers and Clients). Included in the project: - Classes for all types of LDAP Requests and Responses; - Void Server and void Client Classes, ready for custom implementations.

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.