Global

on land

Somo
https://somo.com/
Sadly, it allows for commercial ride servicing.

An app to organize carpooling. You can create groups of friends in it and carpool with them or with strangers. It also gives public transportation schedules.

Hitchwiki
http://hitchwiki.org
100% gift economy!
Land, water and air
A wiki that connects to all sort of hitchhiking tools and sites in order to share rides on land, water or air!

on water

Floatplan https://floatplan.com
Find a crew https://findacrew.net
Crewbay https://crewbay.com
7knots https://7knots.com/
Yotspot https://yotspot.com

Hitchwiki
http://hitchwiki.org
100% gift economy!
Land, water and air
A wiki that connects to all sort of hitchhiking tools and sites in order to share rides on land, water or air!