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Below are some sites that are doing excellent work. Each is providing very helpful tools to advance our capabilities in genetic genealogy.
Clustering your matches is one of the most important steps that you can take when using DNA to figure out or corroborate your family tree. The original and preeminent creator of AutoClusters: Genetic Affairs.
With my personal family mysteries being pretty far back in my tree, for years I’ve been keeping track of every distinct segment I can identify on both my paternal and maternal chromosome copies. I’ve always done this with text files. But DNA Painter makes it simple and more appealing by giving you wonderful visualizations of your chromosomes and segments.
Your DNA family is a new website that recently launched and will provide you with many features, including for your matches and segment-level data, triangulation, family trees, and collaboration with your matches.