Compatible wallets are ERC20 compliant wallets like:
MyEtherWallet (no download needed)
https://www.myetherwallet.com
MetaMask (Firefox and Chrome browser addon)
https://metamask.io
Mist (Desktop)
https://github.com/ethereum/mist/releases
Parity (Desktop)
https://www.parity.io
imToken (iPhone)
https://itunes.apple.com/us/app/imtoken/id1153230571?ls=1&mt=8
imToken (Android)
https://token.im
Trust(iPhone)
https://itunes.apple.com/us/app/trust-ethereum-wallet/id1288339409
Trust(Android)
https://play.google.com/store/apps/details?id=com.wallet.crypto.trustapp
Cipher(iPhone)
https://itunes.apple.com/app/cipher-browser-for-ethereum/id1294572970?ls=1&mt=8
Cipher(Android)
https://play.google.com/store/apps/details?id=com.cipherbrowser.cipher
Do not use the following wallets:
Any Bitcoin or Ethereum exchange
Jaxx
Exodus
Coinbase
Poloniex
Kraken
Bitstamp
Bitfinex
Bitrexx
Cex.io
Click this link to be taken to my Steemit post with a list of giveaways currently running: http://bit-flow.com/free/current-list