We compiled list of useful tools and services. 
https://cryptowatch.net/ - 9 TradingView charts at one page.
https://datamish.com/ - Various charts.
https://bitcoin.clarkmoody.com/ - Good tickers for Bitcoin.
https://blockchainwhispers.com/bitmex-position-calculator/ - Longs vs shorts.
https://aggr.trade/ - Futures/Derivatives aggregator ("must have" for trading)
https://chrome.google.com/webstore/detail/aggrtrade/lllmeoceebooppendmllkpmlcebpgohh - Same thing but on any page ( Futures/Derivatives aggregator on any browser page. )
https://www.tensorcharts.com/ - Chart with heat map.
http://charts.woobull.com/ - Statistics chart.
https://data.bitcoinity.org/markets/books/USD - Combined order book.
https://coinfarm.online/ - Bitmex longs and shorts.
https://messari.io/ - Here you can check cryptocurrency projects with various filters.
https://coinalyze.net/ - Good alternative to TradingView.
https://info.binance.com/ - Great alternative to Messari.
https://www.coingecko.com/ - Alternative to CoinMarketCap.
https://www.cryptocompare.com/ - Alternative to CoinMarketCap.
http://coinmarketcal.com/ - A website that list upcoming or past events about cryptocurrency.
https://coindar.org/ Alternative to CoinMarketCal.
https://www.lookintobitcoin.com/charts/ - Good statistical charts (BTC).
https://bitcoinwisdom.io - "This website also the best for charts."
https://corn.lol/ - Aggregator.
https://whale-alert.io/alerts - Live tracking of large crypto transactions from and to exchanges.
https://edgewonk.com/ - Your trading journal.
https://tradinglite.com/ - Awesome heat maps (not public, you can sign up for early access).
www.tuned.com - Full stack Automated trading creations, testing, execution, reporting.
https://bitcoinvisuals.com/ - Full info about bitcoin, any stats.
https://www.skew.com/dashboard/bitcoin-futures - Bitcoin derivatives stats.
https://deadcoins.com/ - Coins that you don't want to buy.
https://coin360.com/ - Quick market overview.
Portfolio Tracking.
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https://cointracking.info/ - Crypto portfolio tool.
Crypto Market Cap - (Phone) Crypto tracker, Alerts, News = Best App for free trading portfolio.
Blockfolio - (Phone) Same as Crypto Market Cap app but still alike Crypto market cap because it's completely free.
https://coinstats.app/ - Portfolio control.
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Trading Terminals.
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https://cryptowat.ch/ - Good web terminal, comfortable charts.
https://www.trailingcrypto.com/ - Another good trading terminal.
https://3commas.io/ - Trading terminal and a lot nice features.
https://tigertradesoft.com/ - My favorite trading terminal (14 days free trial).
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Crypto news aggregators.
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https://cryptopanic.com/
https://cryptocontrol.io/
https://www.cryptoviral.com/
https://coinspectator.com/
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If you know useful services or tools, post it below
Quoting for future reference as among these tools there are a lot of them that I haven't used till date and would like to know more about them in depth. https://cryptowatch.net/ - 9 TradingView charts at one page.
https://datamish.com/ - Various charts.
https://bitcoin.clarkmoody.com/ - Good tickers for Bitcoin.
https://blockchainwhispers.com/bitmex-position-calculator/ - Longs vs shorts.
https://aggr.trade/ - Futures/Derivatives aggregator ("must have" for trading)
https://chrome.google.com/webstore/detail/aggrtrade/lllmeoceebooppendmllkpmlcebpgohh - Same thing but on any page ( Futures/Derivatives aggregator on any browser page. )
https://www.tensorcharts.com/ - Chart with heat map.
http://charts.woobull.com/ - Statistics chart.
https://data.bitcoinity.org/markets/books/USD - Combined order book.
https://coinfarm.online/ - Bitmex longs and shorts.
https://messari.io/ - Here you can check cryptocurrency projects with various filters.
https://coinalyze.net/ - Good alternative to TradingView.
https://info.binance.com/ - Great alternative to Messari.
https://www.coingecko.com/ - Alternative to CoinMarketCap.
https://www.cryptocompare.com/ - Alternative to CoinMarketCap.
http://coinmarketcal.com/ - A website that list upcoming or past events about cryptocurrency.
https://coindar.org/ Alternative to CoinMarketCal.
https://www.lookintobitcoin.com/charts/ - Good statistical charts (BTC).
https://bitcoinwisdom.io - "This website also the best for charts."
https://corn.lol/ - Aggregator.
https://whale-alert.io/alerts - Live tracking of large crypto transactions from and to exchanges.
https://edgewonk.com/ - Your trading journal.
https://tradinglite.com/ - Awesome heat maps (not public, you can sign up for early access).
www.tuned.com - Full stack Automated trading creations, testing, execution, reporting.
https://bitcoinvisuals.com/ - Full info about bitcoin, any stats.
https://www.skew.com/dashboard/bitcoin-futures - Bitcoin derivatives stats.
https://deadcoins.com/ - Coins that you don't want to buy.
https://coin360.com/ - Quick market overview.
Portfolio Tracking.
______________________________________________________________________________
https://cointracking.info/ - Crypto portfolio tool.
Crypto Market Cap - (Phone) Crypto tracker, Alerts, News = Best App for free trading portfolio.
Blockfolio - (Phone) Same as Crypto Market Cap app but still alike Crypto market cap because it's completely free.
https://coinstats.app/ - Portfolio control.
______________________________________________________________________________
Trading Terminals.
______________________________________________________________________________
https://cryptowat.ch/ - Good web terminal, comfortable charts.
https://www.trailingcrypto.com/ - Another good trading terminal.
https://3commas.io/ - Trading terminal and a lot nice features.
https://tigertradesoft.com/ - My favorite trading terminal (14 days free trial).
______________________________________________________________________________
Crypto news aggregators.
______________________________________________________________________________
https://cryptopanic.com/
https://cryptocontrol.io/
https://www.cryptoviral.com/
https://coinspectator.com/
______________________________________________________________________________
If you know useful services or tools, post it below
Although trading view is the most important when it comes to trading as when you trade you always have to make and study chart patterns and it is the best website for doing so, with almost all the indicators present in it for the purposes of technical analysis. Also there are many telegram channels that are useful in trading for me, I'll edit this post later on and provide the link to those channels and groups.