CS2Stats.gg : Quick lookup for match history and player rankings.
CS2 Official Blog : The primary source for update notes and official news. Steam Workshop: For custom maps (like Aim Botz) and skins. linksforCSGO.txt
Leetify : AI-driven performance analysis to track your improvement. CS2Stats
CSFloat : A popular peer-to-peer marketplace and database for skin floats. linksforCSGO.txt