Just to add, these are the current official links (taken from Discord):

OFFICIAL WEBSITE:
https://metrixcoin.com/

OFFICIAL SUPPORT  PORTAL:
https://support.metrixcoin.com/

WALLETS/SOURCE CODE:
https://github.com/TheLindaProjectInc -Github
https://github.com/TheLindaProjectInc/Altitude/releases/latest/  -Graphical User Interface
https://github.com/TheLindaProjectInc/Metrix/releases/latest/ -Daemons
https://mystakingwallet.com/ -Multi Coin Mobile/Web Wallet (App also available on App Store & Play Store

IN HOUSE PRODUCTS:
https://mynodepool.com/  -Official Staking Pool
https://mystakingwallet.com/  -Multi Coin One Click Masternode/Staking Solution
https://grudgematchgaming.com/  -Grudge Match Gaming
https://lindax.network/ -LindaX (Rebranding Soon)

EXCHANGES:
https://www.idax.pro/exchange?pairname=MRX_BTC -Idax
https://www.coinexchange.io/market/MRX/BTC -Coin Exchange

EXPLORERS:
https://mystakingwallet.com/app/explorer/ -Metrix Explorer 1
https://lindaexplorer.kdhsolutions.co.uk/ -Metrix Explorer 2

COIN STATS:
https://coinmarketcap.com/currencies/metrix-coin/ -Coin Market Cap
https://www.coingecko.com/en/coins/metrix-coin?utm_content=linda&utm_medium=search_coin&utm_source=coingecko -Coin Gecko

HELPFUL DOCUMENTATION/GUIDES:
https://github.com/TheLindaProjectInc/Documentation/

SOCIAL:
https://twitter.com/MetrixCoin/ -Metrix Twitter
https://twitter.com/GrudgeMatchENT/ -GMG Twitter
https://twitter.com/LindaXNetwork/ -LindaX Twitter (Rebrand Soon)
https://medium.com/@Metrix -Medium
https://bitcointalk.org/index.php?topic=5096898.0 -Announcement Thread
https://discord.gg/DY4d7AV -Metrix Discord (You Are Here)
https://discord.gg/cpaNrrt -My Staking Wallet Discord
https://discord.gg/2knfj6M -My Node Pool Discord
https://discord.gg/dPKxXPs -LindaX Discord (Rebrand Soon)