Electrum - User Friendly Bitcoin Client

Electrum is a lightweight client that was designed to simplify the use of Bitcoin. You do not need to perform regular backups, because your wallet can be recovered from a secret phrase that you can memorize or write on paper. There is no waiting time when you start the client, because it does not download the Bitcoin blockchain; instead, the client relies on remote servers.

Features:

Encrypted: your private keys are protected with a password. You are protected from thieves.
Deterministic: If you lose your wallet, you can recover it from its seed. You are protected from your own mistakes.
Instant on: the client does not download the blockchain, it gets that information from a server. No delays, always up-to-date.
Secure: Your private keys are not shared with the server. You do not have to trust the server with your money.
No downtimes: Several servers are available. There is no single point of failure.
Ubiquity: You can use the same wallet on different computers. Your wallet is "in the cloud", and that cloud is the Bitcoin blockchain!
Freedom: Electrum servers do not store user accounts. You are not tied to a particular server.
No scripts: Electrum does not download any script at runtime. A compromised server cannot compromise your client.
Supports Bitcoin URIs
Free software: Gnu GPL v3. Anyone can audit the code. Anyone can run a server.

Download

Linux	In a terminal, type: `sudo pip install http://ecdsa.org/electrum/Electrum-latest.tar.gz` Then, to start Electrum, type `electrum`
Windows	Executable for Win XP & 7 (created by flatfly)
Android	Installation from QR codes

Screenshot

Community

Discussion, bug reports and support: Electrum thread in the Bitcoin forum
IRC channel: join the #electrum channel on Freenode
Documentation: https://en.bitcoin.it/wiki/Electrum
Localization: https://en.bitcoin.it/wiki/Electrum/Translation

Resources for developers

The project is hosted at https://gitorious.org/electrum
Tar archive: Electrum-0.52.tar.gz

Installation from gitorious (Linux):

sudo easy_install ecdsa
sudo easy_install slowaes
git clone git://gitorious.org/electrum/electrum.git
sudo apt-get install python-qt4
cd electrum/client
sudo apt-get install pyqt4-dev-tools
pyrcc4 icons.qrc -o icons_rc.py
cd ../../
python ./electrum/client/electrum

Source installation on Windows:
- Install PyQt4
- Install Electrum-0.52.zip
- execute 'python electrum'