Earning bitcoins for free is not easy, it takes of hard work, patience and determination to earn. Its hard to collect in faucets daily it takes times but if you want to earn freely, joined sig campaign and you can earn bitcoin.
Even earning from signature campaign is not free as you have to post on daily basis and if you don't meet minimum requirements then you will not get paid so it cannot be treated as a free way of earning bitcoins so the only way to get free bitcoins is from faucets.
Of the valves you can get not bitcoin, but a few Satoshi. And to earn there a whole bitcoin, you need to work there for several years. But it is very difficult. This can not be called free of charge