Any I saw many transactions without fees and still getting confirmed.
How is that possible and how can I actually do it?
Every transaction has a "priority" calcuated by the value, confirmations of its inputs, and transaction size. If you mature some coins long enough and transaction size is below 1k, you can send it for free. The theory says you rest 1 btc for 1 day, you can send it for free. In practice, it's not that simple. Don't try it if you are not sure, attach a fee and have peace of mind.
ever gets active and decides to send the coin , he /she/they can send it without fees and still get it confirmed ?