But I'll make an exception today for Strange Adventures In Infinite Space.
For two reasons: it's an excellent mix of Master Of Orion-lite strategy and Star Control-inspired arcade combat; it's now free.
Developer Digital Eel is now offering its six (seven?) year old game as a free download. You can also grab it from publisher Shrapnel Games. Windows and Mac versions are available. Heartily recommended.
Strange Adventures In Infinite Space [Digital Eel]