Realtime transaction data visualizer

Description
Tool(s) to observe what's going into new blocks and what's in the mempool in realtime
Director(s)
Notes from Director(s)
"a flexible backend for exposing this data via e.g. websocket events would provide a foundation for a range of useful tools for bidding, watchlist management, portfolio planning, investor signals, etc. I think some of the existing indexers may provide part or most of the solution already, but i haven't seen examples of what i'm imagining in terms of seeing a live updating view of ongoing bidding activity for filtered names, or a stream of OPENs, or a live chart of bids in mempool by name, lockup amount, fee amount, age in mempool etc. etc." - dees/