This paper presents a survey of software for computational argumentation, focusing on tools and libraries that can be re-used for building applications. The (so far preliminary) survey is intended as a continuously updated resource that researchers and potential practitioners can refer to when selecting tools for their argumentation use cases. The survey results indicate that while a plethora of argumentation tools exist, covering various formal argumentation approaches, the software engineering maturity of the tool ecosystem is low. For example, while many tools are openly available, few are properly documented and covered by automated tests. We argue that many of these shortcomings can be straightforwardly addressed by following simple engineering practices if community consensus regarding basic requirements for software artifacts can be established, as is the case in software engineering-oriented communities.