These web-based tools allow you to create digital maps online. Many of them let you include interactive features and the ability to export to a static image. Keep in mind that for the 2020 Map the Bay map contest we require that the exported image have a minimum resolution of 300 dpi. Look for instructions in the site-specific web help on how to export at high resolution.
These desktop software tools allow you to create digital maps on your computer. Some of them, like QGIS, are designed specifically for mapping and are called Geographic Information System (GIS) software. GIS software work specifically with map data. Others, like GIMP, are more general illustration tools.