Here we have some very good tools to help us navigate the Bitcoin world: network charts, volume of BTC in circulation, tx fees calculation for miners, information about LN etc..

Fee Calculators & Accelerators & stats Blockchain & Nodes Stats Lightning Stats & Tools
Mempool & fees Blockchain stats & charts Lightning Network Stats
Bitcoin Fee Calculator Bitcoin Nodes Lightning Visuals Stats LN Submarine Swaps Coin Metrics Fee Calculator BitTaps – Blockchain Stats  
Price charts & tools Blockchain Explorers Other tools
Bitcoin price chart Bitstamp Bitcoin Visuals Charts
Preev Simple Bitcoin Price Converter OXT Bitcoin Halvening Clock
Bitcoin Stock to Flow LIVE Bitcoin Rich List
Never Look Back Price Index Proof Of Keys Day
  TX Highway – animated realtime txs BitSMS send tx over SMS