WikiTrade

Obsidian (software)

Obsidian is a proprietary personal knowledge base and note-taking application that operates on Markdown files. The software is free for personal and commercial use; only the offered cloud services, optional commercial licenses, and early access versions are paid. It is available as desktop versions for macOS, Windows and Linux as well as for mobile operating systems such as iOS and Android, but not as a web application.

On WikiTrade, every Wikipedia article is a card: the more the article is read, the rarer the card. Open free packs, complete your album, trade, bid and challenge others to general-knowledge duels.

Text from Wikipedia (CC BY-SA 4.0). WikiTrade is an independent site, not affiliated with Wikipedia or the Wikimedia Foundation.