Patronage:

Patreon

The most popular patronage service for supporting webcomics artists, you probably already know it. → Patreon.

Liberapay

A free/libre alternative to Patreon designed for more privacy and lowest transaction fees. → Liberapay

Tipeee

An alternative to Patreon using euros with an interface translated into French, Germans, Spanish. → Tipeee (in French)

Donations:

Paypal

The well known payment system that supports online money transfers with many available currencies. → Donate via Paypal.

Wire transfer:

Free of charge within Europe and works worldwide:
IBAN: FR6230002040630000090557K69
RIB: 30002040630000090557K69
BIC: CRLYFRPP

Address for gifts

Here is an address where I'll receive your boxes and letters:
David REVOY au Cabinet Dentaire
135 Avenue des Mourets
82000 MONTAUBAN - FRANCE