BTCLook

A way to verify bitcoin transactions and trace events in the public bitcoin and testnet block chain.

Similar Links

Chain

Block Chain API for Developers

Bitcoin Block Explorer

Bitcoin Block Explorer is an open source web tool that allows you to view information about the blocks, addresses, and transactions created by Bitcoin.

Bitcoin Block Reward Halving Countdown

Bitcoin block reward halving countdown. The Bitcoin block mining reward halves every 210,000 blocks