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.
this mean free get bitcoin is without investment, you can get money only work and follow rules
and signature campaign i think is can get free bitcoin, but must work promotion with post in bitcointalk forum
Yes and it cannot be considered as a totally free way to earn bitcoins but you can start earning without investing a single penny into it and in that case it can considered to be the safest way of earning bitcoins.