I'm also looking for a graph viewing tool, but my wishlist is different (not all of them are hard requirements):

- Deal with 100k node graphs, preferably larger

- Interactive filtering tools, e.g. filtering by node or edge data, transitive closures, highlighting paths matching a condition. Preferably filtering would result in minimally re-layouting the graph.

- Does not need an very sophisticated layout algorithms, if hiding or unranking nodes interactively is easy. E.g. centering on a node could layout other nodes using the selected node as the root.

- Ability to feed live data externally, add/remove nodes and edges programmatically

- Clusters (nodes would tell which clusters they belong in)

I'm actually thinking of writing that tool some day, but it would of course be nicer if it already existed ;). I'm thinking applications like studying TLA+ state traces, visualizing messaging graphs or debug data in real time, visualizing the dynamic state of a network.

Also if you have tips on applicable Rust crates to help creating that, those are appreciated!