Screenshots

Games

OpenRA
A modern cross-platform reimplementation of the Command & Conquer: Red Alert engine using ICSharpCode.SharpZipLib, OpenTK, SDL2#, SharpFont and Mono.NAT.
OpenRA screenshot, click to open larger image
Second Life
Second Life uses Mono as an engine that accelerates the execution of user provided scripts by translating LSL scripts into ECMA CIL bytecodes and in turn letting Mono turn that into x86 machine code.
Second Life screenshot, click to open larger image

Gtk# Applications

Banshee
Banshee is a music organizational and playback tool.
Banshee screenshot 1, click to open larger image Banshee screenshot 2, click to open larger image
F-Spot
F-Spot is a photo management application for the GNOME desktop.
F-Spot screenshot 1, click to open larger image F-Spot screenshot 2, click to open larger image
GNOME Do
GNOME Do is a crazy-delicious launcher tool that makes performing common tasks on your computer simple and efficient.
GNOME Do screenshot 1, click to open larger image GNOME Do screenshot 2, click to open larger image
MonoDevelop
MonoDevelop is a free GNOME IDE primarily designed for C# and other .NET languages.
MonoDevelop screenshot 1, click to open larger image MonoDevelop screenshot 2, click to open larger image
MonoUML
MonoUML is a CASE tool designed for allowing all UNIX/Linux developers faster computer systems design using a friendly GUI application.

OpenVPN-Admin
OpenVPN-Admin is a GUI for OpenVPN that runs under Linux and Windows.
MonoUML screenshot, click to open larger image OpenVPN-Admin screenshot, click to open larger image
Pinta
Pinta is a paint program designed for simplicity and ease of use. It is modeled after Paint.NET.
Pinta screenshot 1, click to open larger image Pinta screenshot 2, click to open larger image
Tomboy
Tomboy is a desktop note-taking application for Linux and Unix. Simple and easy to use, but with potential to help you organize the ideas and information you deal with every day.
Tomboy screenshot 1, click to open larger image Tomboy screenshot 2, click to open larger image
Smuxi
Smuxi is a flexible open-source cross-platform IRC client for the GNOME desktop.
Smuxi screenshot 1, click to open larger image Smuxi screenshot 2, click to open larger image

Winforms Applications

Open Source Applications

NClass
NClass is a UML modeling application written in C#.

Paint.NET
Paint.NET hasn't been fully ported to Mono yet (due to p/invokes), but we can still see it using the new 2.0 controls.
NClass screenshot, click to open larger image Paint.NET screenshot, click to open larger image
SharpChess
SharpChess is a free computer application that enables you to play chess against the computer.

Reversi
Reversi is a popular game that is fun, requires just a few basic elements and has simple rules.
SharpChess screenshot, click to open larger image Reversi screenshot, click to open larger image
MonoCalendar
MonoCalendar is an application designed for easy management of calendars.
MonoCalendar screenshot 1, click to open larger image MonoCalendar screenshot 2, click to open larger image
NUnit
NUnit is a unit testing framework that is open source written in C#.
NUnit screenshot 1, click to open larger image NUnit screenshot 2, click to open larger image
MoMA
MoMA is a tool that helps you identify issues you may have when porting your .NET application to Mono.
MoMA screenshot 1, click to open larger image MoMA screenshot 2, click to open larger image

Commercial Applications

Plastic SCM
Codice Plastic SCM - Commercial, Cross-Platform Source Control Management system for Windows (not pictured), Linux, and macOS.
Plastic on Linux screenshot, click to open larger image Plastic on macOS screenshot, click to open larger image
Likewise
Likewise Administrative Console (LAC) - ´╗┐commercial, cross-platform ´╗┐graphical administration console for Windows (not pictured), Linux, and macOS.
Likewise on Linux screenshot, click to open larger image Likewise on macOS screenshot, click to open larger image
Nu Tech Software Solutions
A virtual keypad and graphical status for Ademco Honeywell alarms.

Client-server socket support, write custom modules with supplied API and examples to perform your own tasks upon alarm events, customize your own buttons and images and much more.

NuTech on Linux screenshot 1, click to open larger image NuTech on Linux screenshot 2, click to open larger image

ASP.NET

mojoPortal
mojoPortal is an open source content management system and web site framework portal for .NET on Windows or Mono on Linux and macOS.

BlogEngine.NET
An innovative open source blogging platform developed with ASP.NET 2.0.
mojoPortal screenshot, click to open larger image BlogEngine.NET screenshot, click to open larger image
SplendidCRM
SplendidCRM was built on the Microsoft technology stack using Visual Studio 2005 Professional, but also runs on Mono.

Graffiti CMS
Graffiti CMS allows you to quickly publish and maintain dynamic content Web sites with little or no knowledge of Web programming.
SplendidCRM screenshot, click to open larger image Graffiti CMS screenshot, click to open larger image

Other Mono Applications

Unity
Game Development Tool implemented using Mono.
Unity3d on macOS screenshot, click to open larger image
Maemo
Mono can be run on embedded devices like the Nokia 770. A video of the Nokia 770 running Gtk# is available here.
Maemo screenshot, click to open larger image
Eclipse
Eclipse is an IDE written in Java. It can run on Mono using IKVM, the Java VM for .NET.
Eclipse on IKVM
SimplePM (non-English website)
SimplePM_Server solutions checking subsystem, a part of SimplePM programming contests management system, was written in C# and fully supports Mono. SimplePM is an open source software licensed under Apache License 2.0