I already made a topic about Darkwallet to revive the project and so the bitcoin community start funding it but that didn't really work so it seems like Darkwallet project is dead and there is no one who is working , and as you can see here , funding is still at 75% an dit being months it has been that way :
https://www.darkwallet.is/donate/and According to their website (check the bold part mostly) :
Remember: this is only a alpha preview. Do not expect stable software yet. Right now it is only available for Chrome/Chromium browsers.
IMPORTANT The wallet is Not Stable or Safe, and at this point you should use it with real money only at Your Own Risk.
You can use it with testnet coins so it's safe to test like that though. Choose testnet network when creating the identity.
Now for what comes to CoinJoin and according to Wikipedia
https://en.wikipedia.org/wiki/CoinJoin :
here are several implementation of anonymous bitcoin transactions inspired by CoinJoin: SharedCoins,[2] Dark Wallet,[3] CoinShuffle,[4] DarkSend in Darkcoin and JoinMarket.[5]
So for SharedCoin :
https://sharedcoin.com/ (It's related to Blockchain.info as far as I know , so you can just go to your Blockchain wallet and go to Sending tab , you should find something there)
Thank you for these options. Really looking for a service such as coinjoin or darkwallet, only without all the tech knowhow, just ninstall and run
I really like the sharedcoin application, only it talks about trustless, yet wants me to open a account on blockchainwallet!? So I have to trust Blockchain... If they go belly up or decide to dissapear, bye bye
Since we're talking about substantial amounts, around 7 to 12 btc, I wont be taking that gamble