Have used two sources - this list of bitcoin faucets and this list of altcoin faucets.
The benefit of the altcoin faucets is that they pay out immediately. the drawback is that they drip pitifully small amounts in satoshi terms - you could spin your wheels for hours filling in captchas just to get a few cents worth. The bitcoin faucets drip much more, but they payout once a week on sunday and monday.
My grand total from the altcoin faucets is 5825 satoshis! Pitiful but enough to do a trade. Hopefully by next week I'll have more to play with when the bitcoin faucets pay out.
Have decided on a "satoshi-swing-trade" strategy. That is, I'm going to trade Reddcoins for a 1 satoshi difference. So today I placed a buy for a 13 satoshi price. When it executes, I'll place a sell for 14 satoshis. This should give me a profit of about 7.7%. Then rinse and repeat - put the money from the sale back into a buy order at 13, and then sell at 14.
Obviously the market may move against me - but I'll just place new trades at higher or lower prices and leave existing trades to wait it out to execute. As long as I stick to the mechanical "always sell at one satoshi more than I buy" I should make a profit. Compounding should do the rest as I reinvest what I make.
Meanwhile, here's a screenshot below of my initial "capital". I intend to keep a running total of the faucet amounts I collect so I can see how much I got and how long it took to collect. Until tomorrow, ciao.