If you keep all your media on one Mac (or PC), use StreamToMe to stream it to any other remote Mac. It’ll stream photos, music, and movies in tons of format, and HD quality. Both StreamToMe and the server component, ServeToMe, are free for the Mac, and StreamToMe for iOS is just $2.99.

A Monster Ate My Homework is a charming physics puzzler game packed with 80 levels where you launch balls at monsters trying to knock them off a platform, without also knocking off your homework. (It’s also a 99-cent universal app for iOS, with a free Lite version available too.) We. Can’t. Stop. Playing.

Plan your next sightseeing trip, or find cool points of interest in your own backyard with location-aware, Wikipedia-linked, ad-supported World Explorer.

If you already have VLC you might not need this, but MPlayerX looks slicker and has multitouch controls and support for the Apple Remote.

Autodesk’s SketchBook Express witha "lite" version of SketchBook Pro) is a drawing app has plenty of brushes, an easily understood interface, layers, handy floating palettes, and can save as TIFF, JPEG, PNG, BMP, or PSD. (Hopefully you can draw better than we can.)

Shrook is a good-looking RSS reader that also read your Twitter stream, and (for a $19.95 yearly fee) stays in sync with other Macs and the free Shrook Reader for iOS app.

Swackett is an attractive spin on a weather app that tells you if you should wear a sweater, jacket, or coat. But you don’t actually need the app—it’s also at www.swackett.com/app.

SoundCloud’s web service lets anyone share their own music, and the free desktop app provides an easy way to do that, with recording, organizing, listening, searching, and sharing.

Whistle Phone’s best feature is free inbound and outbound calling to the lower 48 United States. You’ll hear a short ad before each call, but…it’s free. So call your mom; she misses you.

Part Quicksilver, part LaunchBar, part Google Desktop, Alfred is useful key-command-driven app that lets you launch apps plus search your Mac and the Web.