Description: OpenStreetMap is a free, open-source, crowd-sourced map of the world. Volunteers collect map data using GPS devices, aerial imagery, local knowledge, and other free sources to create and update the map database.
Type: software
Pricing: Open Source
Description: ReadEra is a PDF and ebook reader software for Windows, macOS, Linux, iOS and Android. It supports many document formats and features such as annotations, text reflow, bookmarks, and synchronized reading across devices.
Type: software
Pricing: Freemium