Wings of Saint Nazaire is an indie space-combat game built with the Unity engine to recall the classic gameplay of the Wing Commander and X-Wing franchises (thanks Ant via Indie Retro News). A full release is TBA, but they currently offer an alpha version which can be played online in your browser, or downloaded for Windows, OS X, and Linux. Here's a really old trailer showing things off, and here's word:

Wings of Saint Nazaire is an action-orientated space simulation game reminiscent of titles such as Wing Commander™ and the X-Wing™ series. Wings is designed to be an easy-to-play but hard-to-master game - that means you can jump in, fly around, kick ass and have a ton of fun as a newbie but the game also offers core players enough gameplay depth to keep even the veterans of the genre interested.