This article covers a free overlap map tool where you can create a visual comparison of countries, rivers, states, lakes, man-made features, etc.

Library of Congress has a collection of over 30,000 historical maps which can be used by teachers for teaching and by students for research projects.

This article covers free interactive historical topographic maps that you can use to observe the topographical changes happened since 1880.

Here is a free website with an interactive map of responsive screen sizes. You can check out the screen sizes of popular devices for designing purposes.

Here is a free airline routes map to see direct, indirect flights from any location. Use the websites mentioned here and see flights from any location

MapScaping is a website which offers free printable folding paper globes, which can be downloaded and printed and can be made into folding paper globes.

Here is a free interactive wildfire map where you can track all the forest and domestic fire incidents all over the world and view global fire statistics.

This article covers an interactive map of ancient world where you can explore the political territories of the ancient empires and kingdoms.

This article covers an interactive Map of Ancient History Museums where you can locate the history museums and archaeological sites all over the world.

This article covers a comprehensive interactive world forest map where you can track the deforestation, climate change, biodiversity, and more.