Guys, check out this awesome list of Bitcoin related products and services - a lot of useful information.

Clients

Client software  

• Armory
• Bitcoin QT
• bitcoind
• Electrum
• Multibit

Exchanges

Various exchanges where you can trade bitcoin for other crypto currencies or for fiat currencies.  

• ANX
• Bitfinex
• Bitstamp
• BTC-e
• CampBX
• Kraken

Mining

Hardware and software that are used for mining.  

• BFGMiner
• CGminer
• ScalaMiner

Unmaintained or Abandoned

• BTCMiner
• DiabloMiner
• Modular Python Bitcoin Miner
• OpenSource FPGA Bitcoin Miner
• Phoenix
• PyOpenCL

Mining Pool Software

Software used to run your own pool  

• eloipool

Mining Pools

Join a pool  

• BitMinter
• CKPool
• Eligius
• Slush's pool

News

News outlets for Bitcoin related products and services.  

• CoinDesk

Payment Processors

Stuff that helps you process payments using bitcoins.  

• BitPay

Copyright (c) 2014 Joshua Estes

https://github.com/JoshuaEstes/awesome-bitcoin/blob/master/LICENSE