Land the Space Shuttle on your iPhone or Android device. Great fun. FlyingSinger put me on to this 10 years ago and I'm still enjoying doing a dead stick landing in the world's most expensive glider!
Martin Schweiger's "Orbiter" is a freeware space flight simulator for the PC that is fun, powerful, realistic, expandable, and educational. Based on the real science and math of orbital mechanics and atmospheric flight, it features a first-person astronaut's perspective and beautiful 3D graphics. Orbiter's developer, Dr. Martin Schweiger, has created an amazing virtual world of real and fictional spacecraft, space stations, planets, and moons. It includes a variety of spacecraft, space stations, and sample scenarios or missions.
Ultra Fighters was a futuristic Combat Sim set here on Planet Earth and released in 1999. Before you play you have to ask yourself, do you have The Right Stuff? In the year 2571 you might find out as a pilot with the Navco mercenary group your job is to rid the Solomon Islands of Zindo forces. Ultrafighters combines the feel and look of a space sim with clouds, hills, vehicles and buildings to attack. If a Space Sim is your style, you get the best of both worlds!
Flying through Yager is like diving into a Jack Vance novel with it's quaint mixture of old and new, the fantastic architecture, the floating ore barges - all fully animated - and the not-quite-earthly watery environs, all seasoned with a quirky sense of humour. Those who remember Strike Commander with affection will appreciate the storyline and the clever mission construction. This type of game has the potential to get people interested in flight sims - but in it's own right it's a fun filled experience. Don't take it too seriously - just have a blast! Given the drop dead gorgeous graphics and the strong role playing element, this is a good sim to recommend as it might encourage new players to look further into flight simulation generally.