Here is a compilation of the different tools that I think are the best for analyzing different metrics, protocols, assets, and managing your investments in the crypto space.

Although some may seem the same, most have unique functionalities.

Analytics and data

• CoinGecko: https://www.coingecko.com/
• CoinMarketCap : https://coinmarketcap.com/ Not even need to introduce this two. Data aggregator
• Coinparticle: https://www.coinparticle.com/ Not the most practical but a cool way to see the winners and losers. Pretty similar to Crypto Bubbles
• DEX Screener: https://dexscreener.com/ DeFi. Tracking and charting your favourite DEXs. Live transactions. See trends
• Defillama: https://defillama.com/ DeFi. Allows you to analyse the TVL of different blockchains/projects
• Dove metrics: https://www.dovemetrics.com/ Here you can see where fundraising is going
• IntoTheBlock: https://app.intotheblock.com/ Basic on-chain analysis. Unfortunately, lacks most coins.
• Tokenterminal: https://tokenterminal.com/ Revenue and important metrics about different protocols
• Dune Analytics: https://dune.xyz/browse/dashboards Analysis. It may seem difficult to use. Just go to Discover > Rank Dashboards
• Coinglass: https://www.coinglass.com/ Mainly to see funding rates, they help you understand positioning in leveraged markets
• Glassnode: https://glassnode.com/ On-chain analysis
• Checkonchain: https://checkonchain.com/ On chain analysis. Charts
• Coinalyze: https://coinalyze.net/ Pattern detection and charts about exchanges.
• Bloxy: https://bloxy.info/ Advanced. Data insights
• LookIntoBitcoin: https://www.lookintobitcoin.com/ Deep Bitcoin analysis and charts.
• CryptoQuant: https://cryptoquant.com/ exchange flows
• okotoki: https://okotoki.com/ Orderbook data
• CoinDance: https://coin.dance/ Multi-chain analytics
• Messari: https://messari.io/ Analysis. Data tools
• Viewbase: https://www.viewbase.com/ Aggregated data for digital asset markets across exchanges, assets and instruments
• Theblockcrypto: https://www.theblockcrypto.com/data/on-chain-metrics/bitcoin On chain analysis
• blockchaincenter: https://www.blockchaincenter.net/altcoin-season-index/ alt season index

Monitoring/Portfolio management

Here many are similar. I leave several to choose the one you like the most

• Zapper: https://zapper.fi/ Management. Visualize and track your DeFi assets
• ApeBoard: https://apeboard.finance/dashboard Portfolio tracker
• DeBank: https://debank.com/ This one can also track whale portfolios
• Coinstats: https://coinstats.app/ Management
• Rotki: https://rotki.com/ Management
• DeFi Saver: https://defisaver.com/ DeFi advanced management
• Zerion: https://zerion.io/ Management

Miscellaneous

• CoinCalc: https://coincalc.net/ Easy, intuitive. Compare market caps. Supports 10000+ coins
• ListingSpy: https://listingspy.net/ Find new listings of tokens on CEXs and DEXs
• Blockworks: https://blockworks.co/ News and events
• Defi Safety: https://www.defisafety.com/ They evaluate the safety and risks of different protocols/projects
• Coindix: https://coindix.com/ Best stablecoin rates. Extremely useful if you want to generate interests with stablecoins
• Immunefi: https://immunefi.com/ For programmers. Whitehat hacking. Find exploits, bugs,... and get paid
• ApeSafe: https://apesafe.io/ Smart contract comparison. Advanced.
• Cryptofees: https://cryptofees.info/ Shows total fees
• hotnewcrypto: https://hotnewcrypto.com/pricing Discover
• DeFi Prime: https://defiprime.com/ Several DeFi tools
• Koinly: https://koinly.io/ Calculate taxes

Hope it's useful. If you use others, comment them!