The following libraries, wrappers and frameworks are available for Billomat:

PHP

billomatwrapper by Christopher Bölter
billomat-php by tiberianmaster
Billomat Framework by Faruk Yagbasan
billoWrap by Davor Ilic

Ruby

billomat-rb by Ronald Becher
x3ro-billomat-rb by Lucas Jenß
BadBill by Jan-Erik Rediger
– Billomat by Niklas Schreiber, hausgold.de (November 2017)

Java

billomat4j by Oliver Siegmar

.NET

BillomatNet by Andreas Bongardt

Python

billomat.com API client by Jens Nistler
Python Billomat API Client Library by Gerold Penz
billomapy by Michael Bykovski

Perl

WWW-Billomat by Aldo Calpini
You have developed an additional library for the billomat[API]? Then let us know. We are happy to add this in our list!