Bitcoin is both a cryptocurrency and an electronic payment system.

Nxt is an open source cryptocurrency and payment network.

OpalCalc is an interesting combination of a scientific calculator and a spreadsheet, which comes packed with features.

Lingoes is a single-click multi-lingual translation software program released as a freeware translation utility.

Litecoin (LTC) is a peer-to-peer cryptocurrency and open source software project.

Groestlcoin is a multipurpose cryptocurrency that has instant & private transactions with minimal fees.