The PTCA's Antiracism Task Force site will regularly update with new suggestions. Find them here.
Toolkit list compiled for the PTCA by the Anti-Racism Task Force:
ARTF's recommended antiracism resources, featuring notes from those who've used them in their own contexts/ congregation
OTHER resources:
The PCUSA: Facing Racism toolkit and resources
The PCUSA's Matthew 25 effort (scroll down for resources)