Readwise - Effortlessly rediscover and organize your Kindle highlights
Mapstr - Your places, your world!
Knotes - An efficient, beautiful Kindle highlights & notes manager
Location History Visualizer - Visualize Google location history data on a heatmap 🗺️
Clippings.io - Organize the notes you make on your Kindle
Mapiful - Create & order custom printed maps of your favorite places