GTrader

Buy and Sell throughout the galaxy. Try to make a million credits in the shortest amount of time by buying some of the three items on a planet's export list then selling them to a planet with those items on it's import list.
Each star system can have from 1 to 9 planets. Each planet, if inhabited, will buy and sell three resources. No planet buys and sells the same resource.
The galactic economy is dynamic. If you buy all of a planet's resource, the planet will gradually replenish it's supply and will have more later. If you sell to a planet all of the resources that it needs, the planet will gradually use up those items and will need more later.
Star type affects the probability of it having habitable planets.
The distance between stars affects the time it takes to jump there.
The Game can be saved and reloaded. High score is maintained.
The Log feature records the planet information from the last visit and the Ops feature allows you to check your inventory.
A trading help feature highlights resources on the planet's buy/sell lists if that item is in your inventory.