Plotiar
Best for: novelists who want maps and family trees built into the same project as the manuscript.
Plotiar is a writing workspace built around the manuscript. A map starts from a blank canvas or your own map image, with drawing tools, layers and markers. Family trees show lineages across generations, with partners, parents, siblings and divorces, and link to character sheets. Lore, Plotiar's story bible, holds your characters and places, and it is free on every plan too.
Where it falls short: The free plan holds five projects.