We have a best free apps thread, which should be stickied given the thread starters efforts, an excellent thread. We should also have a best paid apps thread. I'll categorize them according to app store categories, link each app to the app store, and rank apps in order of mentions by MacRumor members. Try to concisely list the features that you like about your recommended apps (Your recommended apps will not be listed if no reasons are given, since part of the purpose of this thread is to help people looking for a particular kind of app decide what app to get). Productivity [app]Things[/app] - a popular to do app, syncs to a desktop counterpart via LAN. [app]Pocket Informant[/app] - Schedule and task app. Multiple calendar views, timebars in monthview, and tasks that show up on the appointed days. Excellent developer experience and support. Syncs to Google calendar and Toodledo. [app]Documents To Go[/app] with Exchange attachments is proving to be a very useful app for me, allowing me to access, view and edit documents from my work Exchange email, and files synced from my MacBook using the DTG desktop app, which allows syncing of entire folders. Excel editing supposed to be coming very soon. [app]Air Sharing Pro[/app] - Great way to store documents and other files on the iPhone. Connect via IP Address. Can also access iDisk and print documents stored. Avatron.com [app]GoodReader[/app] - Decent and inexpensive PDF reader. Can handle large PDFs. WiFi transfer. How GoodReader Works [app]Outliner[/app] - Great for lists, checklists, and brainstorming. Syncs to an online service. [app]Instapaper Pro[/app] - Read articles offline. Articles well formatted, and the tilt scrolling is an added bonus. [app]Instaviz[/app] - A learning curve to use this mindmapper/flowchart app, but the flexibility of node linking and automatic organization make it a superb app for figuring out more complex stuff. [app]Touch Goal[/app] - Quickly record and view whether you kept to a habit or activity. [app]Momo[/app] - Passcode to open this app, tags, full text search, and live URLs, phone numbers, and email addresses make this app very functional. [app]Readdledocs[/app] - Get docs from emails into this app. [app]iSaveWeb[/app] - Save webpages for offline viewing. Utilities [app]Measures[/app] - Quick unit conversions, great interface. [app]Picture Safe[/app] - Lock pics, and organize them into folders as well as the order of pics. Entertainment [app]myVideos[/app] - Download videos off various Internet sites for offline viewing. [app]Koi Pond[/app] - Very nice relaxing digital pond. Social Networking [app]mBoxMail[/app] - Hotmail! Get all folders, and open links within the app. [app]Beejive IM[/app] - Instant messengar with push notifications. Supports MSN, AIM, Yahoo, Google, and Facebook. Great interface. [app]Tweetie[/app] - One of a a few popular Twitter apps. Photography [app]Photogene[/app] - Crop, rotate, and add filters to your pics. [app]Photoforge[/app] - Curve tool bring out detail from shadows in pics. Games - Racing [app]Real Racing[/app] - The most realistic and best graphics racing game. - Simulation [app]Let's Golf[/app] - Cartoon golf at it's finest. Lots of different locations/characters. - Strategy [app]Uniwar[/app] - Turnbased online strategy wargame. [app]Stickwars[/app] - Recommended, but no description provided. [app]Galcon[/app] - Fastpaced online strategy game. A battery killer though. - Not yet categorize games [app]Geared[/app] - Recommended, but no description given yet. Business [app]1Password Pro[/app] - Encrypted Password to store Credit Card numbers, membership info, web logins, etc. Automatic login into sites without having to type in usernames and passwords. Syncs to desktop counterpart via LAN. Reference [app]Oxford Deluxe[/app] - The entire unabridged single volumes Oxford Dictionary and Thesaurus all in a beautiful and easy to use interface. Expensive, but worth it. [app]Wisdom[/app] - Example sentences, and kanji jump make this indispensible for anyone living in Japan or studying Japanese. Music [app]Spotify[/app] - although a free app, requires a £10/month premium membership. Unlimited access to millions of artists from all 4 major record labels and a host of others. Stream music over wifi/3g/edge, seamless syncronisation of your playlists, and choose playlists to be available offline (tracks download over wifi). This is a truly awesome service and quickly replaced my iPod app - I removed all my music through iTunes sync and set it all up through spotify, no more USB syncing for me! Not available in the US yet, sorry guys. Coming later in the year I believe. [app]Xewton Music Studio[/app] - Keyboard app, an assortment of instruments. [app]Beatmaker[/app] - Beats and sound effects, a DJ sort of app. Health and Fitness [app]Bodybook Fitness Journal[/app] - Great workout log. Highly customizable. Graphs are superb. News [app]Newsstand[/app] is quite simply THE best Google Reader syncing RSS app I have used. Feature-rich with landscape, sharing of articles, create & edit google reader folders and subscriptions. Superb UI. Finance [app]Billminder[/app] - Great app to help you keep track of bills, due dates, account numbers, and creditor contact information. Passcode protection is an option (that I use). 1$ for App, and 1$ a year for push notifications. Great interface, calander view, and icons for quick reference. Also allows for auto pay options.