I have been checking the Bitcoin wiki for script and Bitcoin contracts and I have some doubts about advanced contracts.
For instance, I have seen in many places references to password controlled transfers, where only the owner of a keyword could get the BTC in the contract. Do you know of any example in the blockchain? I am curious about anything with script commands beyond the standard use.
Advanced contracts are hardly used currently, if at all - simply because the software to construct the necessary transactions has not been written yet. I doubt you will find examples on the blockchain.
I can check the kind of transactions I am curious about.
There are some interesting things there and I will spend some time looking into all, but, as a whole, there are few complex contracts (a few miners accept them). I will take Meni Rosenfeld's answer as the accepted answer.