Commander: Conquest Of The Americas Gold | IGS | £0.60 ($1, RRP: £7.99)
IndieGameStand doesn't just do PWYW deals, you know. They're currently selling this reasonable (if inconsistently-reviewed) naval strategy game for 60p, which saves you over £7 versus the RRP and even undercuts Steam's weeklong sale by £1.30. I can't personally vouch for this one, so you might want to do your homework. Thanks to jaystan @ HUKD!