Bitcoin 0.7.0 - Experimental digital currency.. (Free)

Bitcoin 0.7.0 - Experimental digital currency.. (Free): "

Bitcoin is an experimental new digital currency that enables instant payments to anyone, anywhere in the world. Bitcoin uses peer-to-peer technology to operate with no central authority: managing transactions and issuing money are carried out collectively by the network. Bitcoin is also the name of the open source software which enables the use of this currency.

The software is a community-driven open source project, released under the MIT license.

Version 0.7.0:

• Replaced the 'getmemorypool' RPC command with 'getblocktemplate/submitblock' and 'getrawmempool' commands.
• Remove deprecated RPC 'getblocknumber'
• Reduced CPU usage, by eliminating some redundant hash calculations
• Cache signature verifications, to eliminate redundant signature checks
• Transactions with zero-value outputs are considered non-standard
• Mining: when creating new blocks, sort 'paid' area by fee-per-kb
• Database: better validation of on-disk stored data
• Database: minor optimizations and reliability improvements
• -loadblock=FILE will import an external block file
• Additional DoS (denial-of-service) prevention measures
• New blockchain checkpoint at block 193,000
• Internal HTTP server is now thread-per-connection, rather than a single-threaded queue that would stall on network I/O.
• Internal HTTP server supports HTTP/1.1, pipelined requests and connection keep-alive.
• Support JSON-RPC 2.0 batches, to encapsulate multiple JSON-RPC requests within a single HTTP request.
• IPv6 support
• Added raw transaction API. See https://gist.github.com/2839617
• Added 'getrawmempool', to list contents of TX memory pool
• Added 'getpeerinfo', to list data about each connected network peer
• Added 'listaddressgroupings' for better coin control
• Rework getblock call.
• Remove deprecated RPC 'getblocknumber'
• Remove superceded RPC 'getmemorypool' (see BIP 22, above)
• listtransactions output now displays 'smart' times for transactions, and 'blocktime' and 'timereceived' fields were added
• IPv6 support
• Tor hidden service support (see doc/Tor.txt)
• Attempts to fix 'stuck blockchain download' problems
• Replace BDB database 'addr.dat' with internally-managed 'peers.dat' file containing peer address data.
• Lower default send buffer from 10MB to 1MB
• proxy: SOCKS5 by default
• Support connecting by hostnames passed to proxy
• Add -seednode connections, and use this instead of DNS seeds when proxied
• Added -externalip and -discover
• Add -onlynet to connect only to a given network (IPv4, IPv6, or Tor)
• Separate listening sockets, -bind=
• Add UI RPC console / debug window
• Re-Enable URI handling on Windows, add safety checks and tray-notifications
• Harmonize the use of ellipsis ('...') to be used in menus, but not on buttons
• Add 2 labels to the overviewpage that display Wallet and Transaction status (obsolete or current)
• Extend the optionsdialog (e.g. language selection) and re-work it to a tabbed UI
• Merge sign/verify message into a single window with tabbed UI
• Ensure a changed bitcoin unit immediately updates all GUI elements that use units
• Update QR Code dialog
• Improve error reporting at startup
• Fine-grained UI updates for a much smoother UI during block downloads
• Remove autocorrection of 0/i in addresses in UI
• Reorganize tray icon menu into more logical order
• Persistently poll for balance change when number of blocks changed
• Much better translations
• Override progress bar design on platforms with segmented progress bars to assist with readability
• Added 'immature balance' display on the overview page
• (Windows only): enable ASLR and DEP for bitcoin-qt.exe
• (Windows only): add meta-data to bitcoin-qt.exe (e.g. description)
• Additional unit tests
• Compile warning fixes
• Reopen debug.log upon SIGHUP
• Bash programmable completion for bitcoind(1)
• On supported OS's, each thread is given a useful name

Mac OS X 10.6 or later

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(Via MacUpdate - Mac OS X.)