Simulation

Baseball Mogul 2007 lets you be the manager of a Pro, AAA, or High School team, even down to calling each pitch that is thrown. It was the best-selling baseball game in 2006, and it's now a free download. If you like accurate simulations, managing contracts, trading players, drafting, and like to play around with baseball statistics, this might be the game for you.

This version includes.

• Animated Play-By-Play
• Pitch-By-Pitch Mode
• Custom Pitcher Database
• Lefty-Righty Stats
• New Batter Rating System
• Improved Minor League Simulation Engine
• 2006 Opening Day Rosters
• Roster Tools
• Faster Simulation Speed

Baseball Mogul is the only game that includes every season from 1901 to the current season, complete with hand-edited rosters and ratings for thousands of major and minor league players.

Download Basebal Mogul 2007 for free at SportsMogul.com.

NationStates.net is a online game where you can create and run your own nation. From the website:

NationStates is a free nation simulation game. Build a nation and run it according to your own warped political ideals. Create a Utopian paradise for society's less fortunate or a totalitarian corporate police state. Care for your people or deliberately oppress them. Join the United Nations or remain a rogue state. It's really up to you.

They seem to have a really great community going, and the pictures of in-game content on the forum look great. It looks like they are doing a pretty good job of letting you create and run a complete nation. You can even create your own adventures.