Program: Radicale CalDAV and CardDAV server
License: free and open-source
Description: Radicale is a free and open-source CalDAV and CardDAV server. "Radicale is a complete calendar and contact storing and manipulating solution. It can store multiple calendars and multiple address books."
Radicale has portable version once before. Adamas User made it https://portableapps.com/node/33809. Unfortunately topic is dead and even worse there's no way to download or find that RadicalePortable_1.1.1_Dev_Test_1_English.paf.exe file.
If someone can make similar App or can share Adamas version it would be great.