An open-source, Android-specific wallet that can exchange BTC for a number of world currencies.
ZCash Cockpit UI Wallet
A desktop-based Zcash (ZEC) wallet that runs on Linux only.
Client-side, web-based Dogecoin wallet that allows for the creation and import of paper wallets.
The official wallet of Counterparty (XCP), has an advanced, built-in exchange for BTC and tokens.
Dogecoin Core Client
The original, open-source DOGE node software, a bitcoin fork, contains entire DOGE blockchain.