I'd like to see a comparison of features (audited, how active it is, last modification, usage in real world, ..) among the known multisig wallets: this for creating a reference comparison for choosing the best-fitting for a given use-case.

I've searched around but people seem to be suggesting different things. For example, this thread Where's the Solidity code for Mist's default multi-sig contract wallet? says dapp-bin is outdated and to use this meteor-dapp-wallet contract (https://github.com/ethereum/meteor-dapp-wallet/blob/master/Wallet.sol). But I see the last modification on Git for dapp-bin is much newer. https://github.com/ethereum/dapp-bin/blob/master/wallet/wallet.sol

This is another option: github.com/gnosis/MultiSigWallet/blob/master/contracts/MultiSigWallet.sol