Electrum Bitcoin Client

Electrum is an easy to use Bitcoin client. It protects you from losing coins in a backup mistake or computer failure, because your wallet can be recovered from a secret phrase that you can write on paper or learn by heart. There is no waiting time when you start the client, because it does not download the Bitcoin blockchain.
Link: 
https://electrum.org/
Category: 
Wallets
Tags: 
wallets
offline wallets
open source

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BTC Vault

A Linux distribution designed to securely handle bitcoin wallets. BTC Vault is based on Slax and thus contains a full Linux installation including the KDE desktop environment and the Firefox webbrowser. Also, BTC Vault includes the Electrum bitcoin client and the MultiBit bitcoin client that you can use to manage your coins.
http://dswd.github.io/btcvault/

Bitcoin Paper Wallet

Print Tamper Resistant Paper Bitcoin Wallets (Safe Generator)
https://bitcoinpaperwallet.com/

SegWit Paper Wallet

Segwitaddress.org is an open source bitcoin paper wallet generator that utilizes Segregated Witness (SegWit) Pay To Witness Public Key Hash (P2WPKH) addresses and transactions. Segwitaddress.org uses the BitcoinJS library. All of the functions on this page can be ran offline.
https://segwitaddress.org/

Blockchain Wallet

My Wallet is a free online bitcoin wallet which you can use to make worldwide payments for free. We make paying with bitcoins easy and secure available anywhere on your phone or desktop.
https://blockchain.info/wallet/