Here's a list of all FSX-native addon aircraft in development, either freeware or payware, as of March 24, 2013, that I know of.
Please add to it if you do not see something listed.
Tried to add a development team name when 100% known, and a website as evidence.

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Here is the list of add-on FSX Native aircraft in development. The list will be updated by Sean. Thanks for any information and help.

FSX Native Aircraft in Development Click HERE!!!