Earn Bitcoins just by visiting this site (and looking at the ads). There is a large number of other sites like this and I picked this particular one quite randomly. All you do here is go to that site, enter your Bitcoin address and fill out the CAPTCHA. You can repeat this as often as you like but only once every 30 minutes. For each visit you get BTC 0.0000025 (as of August 2013; this is likely to change when the Bitcoin exchange rate goes up). After your visit, your reward is sent to CoinBox.me. This happens to collect many small payments and to combine them for one bigger payout. When you visit many sites in parallel, this could be a way to keep you busy throughout the day and make some change.
pays via Microwallet
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http://www.cryptoblox.com/faucets/BitCoin/?r=1EWCsdhBp1LBXBTSKm6JpgwshW51tbsJNa
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Pay via Bit Chest
• http://www.freebitcoin.ws/?r=dCqHlr
• http://www.8coin.me/?r=dCqHlr
• http://www.bbitcoin.me/?r=dCqHlr
• http://www.bitcoinfaucet.me/?r=dCqHlr
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http://btc25.net/?id=205262