UPDATE: CNN has updated its investigation tracker, making it easier to explore past developments and keep tabs on new ones as they emerge.
CNN has produced an extremely useful interactive tool called "Tracking the Russia Investigations" that compiles all known charges, subpoenas, warrants, testimony, and developments in the various Russia investigations and allows you to explore information about them by name or entity.
CNN:
The investigations are supposed to be conducted in secret, so many details are not publicly available. This interactive tracks the publicly known developments of the sprawling investigations into Trump and Russia – and probably represents a slice of what has actually taken place.
Click here to explore the tool.