As of June 2, 2011, I’ve updated my answer here:
For me?
SOCIAL MEDIA
- Twitter app. I use it all day long. I also use heavily the Facebook and LinkedIn apps.
- Hashable app. Is quickly becoming the way to trade info among industry insiders.
NEWS APPS
- NPR News. Nicely designed.
- CNN. Sometimes I watch CNN for live news reports.
- SkyGrid. Best news app, especially for tracking companies.
- NYTimes. You know, the New York Times.
- HuffPost. Huffington Post.
- BBC News. The best news organization.
- AJE Live. For keeping up on the Middle East.
- WSJ. Wall Street Journal is must own.
- TED Mobile. I love TED talks.
- Pulse News. Very nice news reader.
- Feedly. Very nice news reader too, with good tablet apps (great for RSS).
TRAVEL
- TripIt. Keeps all my travel data and helps me get information from airlines and others.
- TripAdvisor.
- Kayak. The standard for flights.
- FlightTrack. See where your flight is.
- Uber. Find a driver in some cities like SF and NY.
- Travelocity.
- Hipmunk. Best way to find a flight or hotel.
- Room 77 Find the best hotel room and use that to negotiate with hotel.
MAPS:
- Waze. Crowd-sourced traffic.
- Trapster. Shows you where the cops and traffic cameras are.
- Goby. Finds me things around me, like hiking trails.
- AroundMe. Quick, simple list of businesses around me (gas stations, etc).
- Find iPhone. For when one of our other iPhones are lost.
- SitOrSquat. Finding bathrooms near you.
LOCATION:
- Foursquare. For finding tips about places, checking in, letting friends know where you are, and getting deals.
- Glympse. Send people a temporary map of where you are.
- RunKeeper. Track where you are running or cycling.
- EveryTrail. Find bike trails.
- MapOmatic. For seeing where people have checked in where I am.
- Geocaching. Fun location-based game.
SHOPPING
- Amazon.com. Buying stuff on Amazon.
- eBay. Selling and buying stuff on eBay.
- Square. For buying stuff or selling it.
- RedLaser. For looking up info about products you are seeing.
- CardStar. Holds my loyalty card info.
- PayPal. For paying people via PayPal.
PHOTO/VIDEO
- iMovie. For editing videos.
- Instagram. For sharing photos.
- 360 Panoramic. For taking panoramic photos and sharing them.
- Ustream. For watching and broadcasting streaming video shows.
- Path. For sharing photos with close friends.
- Camera+. The best camera I’ve found.
- Color. Take photos with other people in the same room you are.
- Photosynth. Better quality than 360, but doesn’t Tweet.
- Hipstamatic. Fun effects.
- GLMPS (pre-release, coming soon). Does cool short videos, sorta like instagram.
SEARCH
- Google. The best search app.
- Siri. A personal assistant that uses a variety of services.
- Wolfram. Best scientific facts and results.
- Chomp, for finding and talking about other apps.
- doat. Great mobile search, brings you directly to services.
- Appsfire. Search and discover new apps, see what friends installed
SCHEDULE
- Plancast. My favorite event planning app.
FOOD
- FoodSpotting, for finding a meal close to you.
- Zagat. Best quality restaurant reviews.
- Yelp. Crowd-sourced restaurant reviews.
- OpenTable. Find a restaurant reservation at better restaurants.
- Epicurious. Cooking companion.
- Wine Ratings. Look up wines and see how they rank.
- 20 Min Meals. Jamie Oliver’s app for helping you make healthier lifestyle.
- AllRecipes. More recipes.
- MealSnap. Take photos of your food, get back calorie counts.
- Cor.kz. Help with wine choices.
- Fooducate. Scan food items in grocery store to see if they are healthy.
MUSIC
- NPR Music. Neat app for listening to music.
- Discovr. Find new music.
- Pandora for listening to music.
- Shazam for figuring out what music you’re hearing is about.
- Remote, for controlling my Apple TV.
- soundtracking. Find and share music with the help of your friends.
MEDIA
- CinchCast. For doing audio recordings and sharing them.
- Kindle. For reading eBooks from Amazon.
- IMDb. For looking up info about movies.
- Instapaper, for saving and reading longer text-based media.
- Evernote, for capturing stuff around you you care about.
- Fandango. For finding movies at local theaters.
- Hulu Plus. For watching my favorite TV shows.
- Netflix for watching movies.
- IntoNow. For sharing the TV shows I’m watching (and seeing what’s popular with friends and others).
- Squrl. Finding better online video.
- ShowYou. Finding better online video.
PRODUCTIVITY
- Evernote. Remember things.
- Skype. Talk to coworkers and friends.
- Dictation. Dragon for talking to my iPhone and converting it to text.
- Dropbox, for sharing files with other computers.
- Rackspace Cloud, for managing my cloud servers.
- LogMeIn, so I can sign into my home computers.
- Expensify, for doing expense reports.
- CardMunch, for turning business cards into contacts in my iPhone.
- Google Authenticator. For using two-pass authentication on Google’s services (much more secure).
- DisqusPro. Managing comments on my blog.
- CitySourced. Reporting problems with my city to city government.
- TestFlight. Testing pre-release iOS apps.
- Wi-Fi Finder. To find Wi-Fi hotspots.
- Onavo. Compresses data which saves tons of money overseas when roaming.
- Salesforce Chatter. For talking with my coworkers.
- Flashlight, for those times in the dark when you need to find your way.
PHONE AND CHAT
- Viber. Low-cost calls.
- GroupMe. Group SMS.
- Beluga. Group SMS.
- Grouped{in}. Group SMS.
- Google Voice, for using my phone numbers better.
- Whatsapp. Popular mobile messaging app
OTHERS
- Star Walk, for when you want to look to the heavens and understand what you’re seeing.
So, what else should I load?
One thing, I don’t play games. They are too addictive. But I have been known to play AngryBirds and Cut the Rope kind of games.