The iPhone platform now has more than 200,000 and counting in practically every category. We have introduced the Great Free iPhone 4 GUI PSD Templates For Designers and some iPhone Application Development Resources.For developers, read the source code by others is another good way to improve the develop ability and code quality. Here is a collection of 50+ open source iPhone Apps for iPhone developers. Enjoy!
ABC123 is an interesting game for iPhone, iPod touch and iPad.
"Simple in concept. Brilliantly addictive. Maddeningly challenging." – TheYoshi
Memorize the sequence of letters or numbers. The sequence will then be covered with bubbles. Pop the bubbles in the order of the sequence to beat the level. Source Code Download
Colloquy for iPad, iPhone and iPod touch puts the power of the most popular IRC client for the Mac in the palm of your hand. Built atop the Chat Core framework, Colloquy Mobile is a full featured client optimized for the on-the-go experience with iOS 4 multitasking support. Source Code Download
Diceshaker is a little dice-rolling utility for your roleplaying sessions and board games. It’s designed to be simple, uncluttered and easy to use. Source Code Download
DOOM Classic includes the original three episodes as well as Episode Four, Thy Flesh Consumed, spread across 36 levels of non-stop carnage and action.
In DOOM Classic, multiplayer action is reborn! With a wireless connection, battle up to four players in Deathmatch mode, or work together cooperatively and fight back against the demons of Hell. Source Code Download
Echofon is an easy to use, super-fast Twitter app for the iPhone and iPod Touch.
It’s easy to do common Twitter tasks such as viewing your timeline, messages, replies, lists and favorites. Echofon has a powerful tweet-authoring where you can write tweets, take photos, record video (3GS only) and update your current location. Source Code Download
Gorillas is a port of the original GORILLA.BAS to the iPhone platform.
It’s a turn based single player game where the objective is to blast your opponent away using carefully aimed bananas. Source Code Download
Get up to the minute service level details on all London Underground tube lines, DLR and Overground. Features:
• Line Statuses & Station Messages
• Weekend Closures
• Easily Reorder Lines
• Shake To Refresh!
MiniBooks Lite puts the popular web invoicing software FreshBooks in the palm of your hand. Manage your clients, send invoices, run timers, and record payments, all while on the go. Plus, MiniBooks Lite fully synchronizes with your FreshBooks account, so you have access to your account even when you’re off the grid. Source Code Download
Mobilesynth is an open source classic monophonic synthesizer, designed for live performance. Developers are encouraged to visit the website and contribute. Source Code Download
This is the home of MobileTerminal.app, a terminal emulator application for the iPhone. MobileTerminal.app is NOT an SSH client, nor Telnet for that matter. It can however be used to execute a console ssh-client application.
Molecules is an application for viewing three-dimensional renderings of molecules and manipulating them using your fingers. You can rotate the molecules by moving your finger across the display, zoom in or out by using two-finger pinch gestures, or pan the molecule by moving two fingers across the screen at once. Double-tapping on the display lets you switch visualization modes. Source Code Download
Mover+ is the quickest way to move stuff from iPhone A to iPhone B, with style. Put what you want to send on the Mover table, connect via Wi-Fi or Bluetooth, and flick it offscreen where you want it to go! See the video demo at http://infinite-labs.net/mover/.
Mover+ works with video shot by your iPhone 3GS, and on all iPhone and iPod models with photos, contacts, web bookmarks and text clippings. Mover+ works best when transferring over Wi-Fi and can also connect compatible iPhones and iPod touches over Bluetooth in a pinch. Source Code Download
"NatsuLion for iPhone" (a.k.a. "NatsuLiphone") is a simple Twitter client for iPhone/iPod touch. It has simple, fast, and slick user-interface to enjoy Twitter. It’s based on NatsuLion for Mac OSX and it’s open source application, too. Source Code Download
Introducing PackLog for Backpack. The easiest way to update your Backpack status and add journal entries right from your iPhone or iPod touch!
Unwind at the end of the day and review everything that you and your fellow Backpackers got done. Source Code Download
With iPhone and PocketFlicks you can find movies and manage your Netflix information, all while on the go. Heard about a great movie from a friend of yours? Whip out PocketFlicks and add it to your Netflix queue with just a few clicks. You’ll never forget about a movie you want to watch now! Source Code Download
The SCI-15C is the most accurate and precise emulator of the world-renowned HP 15C RPN high-end scientific programmable calculator available for the iPhone and iPod Touch. We use the *exact same* mathematics and calculations of the original to give you reliable, bug-free, precision and accuracy that you can trust.
It can perform numerical integration and solve the roots of equations in addition to supporting complex numbers and matrix calculations. Source Code Download
Task Coach is a simple open source todo manager to keep track of personal tasks and todo lists. It grew out of a frustration that most task managers do not provide facilities for composite tasks. Often, tasks and other things todo consist of several activities. Task Coach is designed to deal with composite tasks. In addition, it offers effort tracking, categories, and notes. Task Coach is available for Windows, Mac OS X, Linux, and iPhone and iPod Touch.
This is the iPhone version of the open-source Task Coach desktop application (http://www.taskcoach.org/). It features basic task editing and synchronization with its desktop counterpart over the network..Source Code Download
You can listen to more than 5 million tracks for free with Last.fm on your iPhone. Create personal radio stations based on any artist or genres, and listen to commercial free music for hours. With Last.fm on the iPhone you can also check out artist bios and concert information and share your favourite tracks with your friends using the iPhone contact list. Source Code Download
This project is intended as an example both of general programming practices within the iPhone frameworks and of attractive interface and effective interaction design for the iPhone platform.
Tweejump is a jumping arcade game inspired by many wonderful games including Icy Tower, Doodle Jump, PapiJump, and others. Source Code Download
Tweetero is a Twitter client with image upload support. Source Code Download
The application includes the ‘wikiHow Survival Kit,’ a collection of articles to get you through life’s most difficult situations. Includes articles on first aid such as CPR, the Heimlich maneuver, treating burns and bleeding. It also contains wilderness life-savers like how to build a fire or find North without a compass. And you never know when you might need some of the more "unexpected scenario" articles like how to escape from a bear, how to regain control of a spooked camel, or how to survive a riot. Because you never know when you will need this information , the wikiHow Survival Kit is always available – with or without a cellular connection or a Wi-Fi network Source Code Download
It’s easy to manage your WordPress blog from your iPad, iPhone, or iPod touch. With WordPress for iPhone OS, you can moderate comments and create or edit posts and pages. All you need is a WordPress.com blog or a self-hosted blog running WordPress 2.9.2 or higher. Source Code Download
If government agents question you, it is important to understand your rights. You should be careful about what you say when approached by law enforcement officials. If you give answers, they can be used against you in a criminal, immigration, or civil case.
‘Your Rights’ provides effective and useful guidance in a user-friendly question and answer format. The application addresses what rights you have when you are stopped, questioned, arrested, or searched by law enforcement officers. This booklet is for citizens and non-citizens with extra information for non-citizens in a separate section.
‘Your Rights’ tells you about your basic rights. It is not a substitute for legal advice. You should contact an attorney if you have been arrested or believe that your rights have been violated. Source Code Download
Here you will find 31 examples to help you get started as an iPhone developer.