The Farseer Physics Engine is an open-sourced 2D physics engine designed for Microsoft’s XNA and Silverlight platforms. The Farseer Physics Engine focuses on simplicity, useful features, and enabling the creation of fun, dynamic games.

Demos 

• Feature Demos
• Throwing People

You'll find more samples in its SDK download. More...

Enjoy the smooth play in this classic two-player 8-Ball Billiards game, thanks to Justin Petersen from Clarity Consulting. Use your mouse to control the pool cue’s direction and power, as well as ball-in-hand Q-Ball placement after a scratch. For developers, you'll get to lean how force, motion and collision detection is done in Silverlight.

Play Online - C# and VB.NET Source Code 

Balloons is a simple game by Pete Brown demonstrating simple animation and dynamic UserControls in full-screen. "I wrote this to amuse my toddler and have managed to amuse a number of developers with it." Pete.

Online Demo - Source Code

Pete Brown is showing how to handle multiple screens (like Wizard control) and modal dialog in Silverlight. The pattern illustrated provides a way to simulate windows in what is inherently a non-windowed system: the Silverlight plug-in running inside the browser.

Online Demo - Source Code - Direct Download

TruckWars is a simple SilverLight real-time-strategy game. For each level, you control various trucks (and other vehicles), and use them to push down all the green buttons. Enemy trucks will try to stop you.

As always, learning Silverlight through games is fun and effective. You get to learn and play at the same time. This is one good game for you to learn how to move objects around with and without obstrucles. The intent is to have a system of interacting objects where the whole is more that the sum of the parts. For example, units can move, attack, push, carry, grow, heal, crush, and even clone. The board includes various blocks - like open space, water, and stop blocks - to allow for different strategy. There is usually several ways to solve each board.

Play Online - Download Source Code

Free Silverlight controls are popping up a lot lately, especially WinForms-like and charting controls. Here's another chart conrol The FreeSilverlightChart by Venkata Guddanti. It uses XAML and C# to display charts on the Silverlight platform. The FreeSilverlightChart Control supports quite a lot of chart types including: Verticle Bar, Cylinder Bar, Horizontal Bar, Stacked Vertical Bar, Stacked Horizontal Bar, Pie, Area, Stacked Area, Line, Bar & Line, Area & Line, Bar/Area/Line, XY Line, Scatter Plot, Radar, Radar/Area, Funnel, Circular Gauge, Semi-Circular Gauge. 

Online Demo - Source Code

Scribbler is a cool sketch pad sample written in Silverlight by Daniel and Pete from Microsoft. Pick a color and start drawing! You can select items and move or delete them. This sample is great for anyone who wants to learn about color and drawing in Silverlight.

Online Demo -  Source Code

This clock is definitely not for instant use on your website. This sample is intended for showing how to rotate the clock's arm and simulate Timer control from timeline control.

Online Demo -  C# Source Code - VB.NET Source Code

Gary and Jonathan from Microsoft coded this chess game which provides a rich game experience with animated pieces and allows mix of human vs computer players. Two different implementations of the computer algorithm are provided in C# and JScript, both of which execute on the client-side.

Chess Demo - Chess Source Code

Inplay by Lutz Roeder is an in-page audio and video player. It has play/pause button, timeline position and volume control. Plus, you can easily change the query string to play any online audio or video file or to set auto/manual playback. It is cool, isn't it?

Inplay Demo - Inplay C# Source Code

Digger by Lutz Roeder is Boulderdash game clone in Silverlight 1.1.

Digger Online Demo - Digger C# Source Code

This Bubble Factory game was originally created in J2ME (Java). This is basically a port in C# by Vincent Vergonjeanne to run on SilverLight 1.1. It is somehow amazing for the fact that it has been played thousands of time by pure gamers. Play Online

SilverNibbles is a port of Nibbles .NET to Silverlight, and Nibbles .NET is based on the Microsoft QBasic Nibbles game. SilverNibbles uses the Silverlight 1.1 Alpha, so that it can make use of C# code. SilverNibbles team have also taken advantage of the graphics capabilities of Silverlight to enhance the appearance slightly. A recent version can be played online. 

Visual WebGui is an open source AJAX framework, targeted at enabling smooth fast and risk free framework to enable AJAX / Silverlight for complex, data intensive IT level application GUI. Visual WebGui AJAX framework is based on a revolutionary ON-Server approach that offers the highest simplicity in designing and programming, secured front ends and industrial strength that allows unlimited application size and weight on web.

Visual WebGui Features

• AJAX application development using WinForms development patterns and practices with no prior AJAX (or web development) skills.
• WinForms controls (most of .NET 2.0 controls) implemented for VWG.
• Ability to create custom controls (including full inheritance).
• Ability to interoperate with existing ASP.NET controls and pages.
• Ability to customize control behavior and appearance.
• .NET 1.x/2.0 support.

Kit3D is a 3D graphics engine written to work with Microsoft Silverlight. The library is currently written in JavaScript and supports 3D perspective projection and texture mapping. This library allows anyone to easily create 3D content for their Silverlight application. Several online demos are available. 

This cool Flickr's picture uploader in SilverLight recreated by AdvertBoy shows how Silverlight application can upload pictures to Flickr.

It's no surprise that enterprise developers are putting a lot of investments in Silverlight. ComponentOne is no different from the others. It's just they have created the first clone of Google Finance Chart in Silverlight. Meet ComponentOne's Stock Portfolio Manager Demo which features stock chart with interactive scroll and zoom.

Telerik an awards-winning producer of ASP.NET Controls has made the demos of their Silverlight controls available online. The actual controls are not released yet, but in the demos you can view the related XAML and C# markup. The demos feature the following controls: RadAnimations, RadButtons (6 types), RadCombobox, RadListBox, RadMenu, RadProgressBar, RadSlider, RadTabStrip, RadTextBox, RadTreeView and RadUpload.

More details from Todd Anglin's blog post.

Christmas has been celebrated for years but this year is different, totally, because for the first time people can share Silverlight Christmas Cards. And I'm just in time to post this:

• Season's Greetings From Microsoft
• Online Spotlight, Norway
• Happy Holidays From ObjectSharp
• FranksWorld Special Presentation

On November 29 2007, Microsoft Silverlight Team officially announced that Silverlight 1.1 would be renamed to Silverlight 2.0, a jump from a revision to a version. Initially, they had expected several minor upgrades from Silverlight 1.0, but it turned out the opposite. By adding together the Common Language Runtime, Base Class Libraries, Dynamic Language Runtime, the UI Frameworks, DRM, and a shipload of other features, the most appropriate name is definitely Silverlight 2.0.

More details from Tim Sneath's blog post.