Three20 is a collection of iPhone UI classes, like a photo viewer, and general utilities, like an HTTP disk cache. Three20 is derived from the Facebook iPhone app, which is one of the most downloaded iPhone apps ever.

Notes is the most basic space, and currently one of the most popular ones. It allows you to leave a sticky note type of annotation on top of any website and using ShiftSpace, share it with the rest of the world.

Dabble DB is a web-based application that lets you work with data on your own terms. Instead of downloading an application, you upload your data and then build your own database application. Screenshot of a table view You can import existing data or just start from scratch. Extend it or change it as you go. Restructure and redefine how you organize your data on a whim

Walkie Talkie Push to Talk is a mobile application that allows walkie talkie style voice communications. Simply hold down the “Record & Send” button and speak.

Project Eyes-Free turns your Android into an eyes-free communication device with one-handed, single-touch access to common tasks. Applications from this project can be used stand-alone; they can also be used together through the Eyes-Free shell. This collection of videos will cover the latter scenario.

Sipdroid is an open-source SIP client implemented in Java.

The Lang Component provides a host of helper utilities for the java.lang API, notably String manipulation methods, basic numerical methods, object reflection, creation and serialization, and System properties. Additionally it contains an inheritable enum type, an exception structure that supports multiple types of nested-Exceptions, basic enhancements to java.util.Date and a series of utilities dedicated to help with building methods, such as hashCode, toString and equals.

Kestrel is a port of Blaine Cook's "starling" message queue system from ruby to scala: http://rubyforge.org/projects/starling/

In Blaine's words:

Starling is a powerful but simple messaging server that enables reliable distributed queuing with an absolutely minimal overhead. It speaks the MemCache protocol for maximum cross-platform compatibility. Any language that speaks MemCache can take advantage of Starling's queue facilities.

The concept of starling is to have a single server handle reliable, ordered message queues. When you put a cluster of these servers together, with no cross communication, and pick a server at random whenever you do a set or get, you end up with a reliable, loosely ordered message queue.

Scala is a general purpose programming language designed to express common programming patterns in a concise, elegant, and type-safe way. It smoothly integrates features of object-oriented and functional languages, enabling Java and other programmers to be more productive. Code sizes are typically reduced by a factor of two to three when compared to an equivalent Java application.

Alkaline tests your website designs across 17 different Windows browsers right from your Mac desktop in seconds. No need for virtual machines, Windows licenses, or any messing around with Windows Update. Watch our screencast to see it in action.

The iPhone UI icon set gives app developers an extensive library of icons for use in their Tab Bar (UITabBar › UITabBarItem) and Tool Bar (UIToolBar › UIBarButtonItem) item objects.

Description: SystemRescueCd is a Linux system on a bootable CD-ROM for repairing your system and recovering your data after a crash. It aims to provide an easy way to carry out admin tasks on your computer, such as creating and editing the partitions of the hard disk. It contains a lot of system tools (parted, partimage, fstools, …) and basic tools (editors, midnight commander, network tools). It is very easy to use: just boot the CDROM. The kernel supports most of the important file systems (ext2/ext3/ext4, reiserfs, reiser4, btrfs, xfs, jfs, vfat, ntfs, iso9660), as well as network filesystems (samba and nfs).

Getting root on your phone involves exploiting a security hole that existed in an early version of Android. The versions with the security holes are known as RC19, RC28, and RC29 (or RC7 or lower for UK phones). As of RC30 (RC8 on UK), Google patched the security hole so that your phone can not be rooted (don't worry, we can still root it!).