Sparrow for Mac: Earlier this month, we noted that Sparrow for Mac was updated with Retina Display support, OS X Mountain Lion optimization, and support for Mountain Lion’s Notification Center features. Today, that Sparrow for Mac update has made its way to the Mac App Store as a free update. It was previously only available on Sparrow’s website. The app, for new users, costs $9.99, and it has long been regarded as a viable replacement for OS X’s included Mail application. It is $4.99 for the next 3 days to celebrate Retinas!

Steam Summer Sale:  Earlier today, we noted that Steam is having a massive summer sale:

iStack Mac Bundle: Earlier this week, we pointed to the iStack Mac Bundle, a bundle that provides major discounts on some popular applications for the Mac. Parallels 7,  SnagIt, Disk Drill Pro, Hands Off , Clarify, Elasty, PaintSupreme, TextSoap, and iGlasses 3 (together valued hundreds of dollars) is just $50 when purchased through this special bundle program.

Tap Tap Revenge Tour: As a followup to its slew of popular music games, Tapulous has released Tap Tap Revenge Tour. The game features a Tour Mode and a Jam Mode, with the Tour Mode being the spotlight feature of the new game. This mode puts you into the position of a music artist, and you go on “tour” tapping in Tap Tap Revenge. It’s a fun new twist to the popular game, one of the first games for iOS.

Bejeweled Blitz: This popular game title received several enhancements such as Game Center support, improved social support, bug fixes, and new brightness control settings.

AmpliTube Fender (iPad): This music-making application for iPhone and iPad (each device has its own app version) was updated with improved mixing and recording, digital in and out audio, MIDI support, audio copy/pasting, and more.

Jay & Silent Bob in: Too Fat To Fly (iPad): This seems like an addicting new and fun game. From its description:

BBC Olympics: In addition to the NBC Olympics app that we covered earlier today, BBC’s iOS application for full coverage of the 2012 Summer Olympics has been released.