: Here's an offering from (full disclosure) our friend and contributor Marco Tabini at : The $3 app for iPhone takes you straight to the important stuff in your Twitter timeline, creating a links-only feed that displays stories--to be read either in-app, or in their original versions--shared by your online friends. (Links can be re-shared on Twitter, sent by email, or saved to Instapaper.) Plume also lets users create RSS-style curated feeds to gather links from Twitter accounts they aren't following on the main service and allows them to import their own Twitter lists for reading in a separate thread.

: FutureTap keeps refining this offering, a guide that helps you find the nearest stores, salons, coffee shops, and more. The $3 app for iPhone was updated this week with a number of new features--including the ability to bookmark favorite places, integration with several more navigation services (iGo primo, VZ Navigator, and Gokivo) to provide a turn-by-turn guide to finding those locations, improved augmented reality features, and iCloud synchronization so that your bookmarked locations can still be found when you fire up the app on other iOS devices. Thanks to the iPhone and apps like this, it's becoming increasingly impossible to not find a nearby coffee shop.

: It's not enough to make a song anymore--tunes get sliced, diced, and reprocessed into new songs, which then can be stripped for parts and used in somebody else's composition. The $3 app helps music lovers keep track of these uses of songs in your iTunes library, examining individual tracks and letting you know what other songs it samples, which songs sampled it, what cover versions exist, as well as the availability of remixes. Users can share that information on Twitter and Facebook, or they can share music knowledge with other members of WhoSampled's in-house social community. The app has information on 150,000 tracks, and developers say they're adding to that list on a constant basis.

: This isn't an app devoted to --though if you're not careful, you might end being half the man you used to be. The $5 game for iPhone and iPad is an "adult noir thriller" that follows Henry White, his friend Cooper, and the mysterious John Yesterday through the investigation of a series of homicides; users can play any of those three main characters. The noir touch? Yesterday's memory has been wiped; your job is to figure out his secrets. Developer Bulkypix says the game mixes movies, comics, and videogames into a single experience. The question is: Do believe in Yesterday?