Impacket active
Impacket is a collection of Python classes for working with network protocols.
Open Source Tools
pysap active
pysap is an open source Python library that provides modules for crafting and sending packets using SAP's NI, Diag, Enqueue, Router, MS, SNC, IGS, RFC, NWRFC and HDB protocols.
HoneySAP active
HoneySAP is a low-interaction research-focused honeypot specific for SAP services. It's aimed at learn the techniques and motivations behind attacks against SAP systems
SAP Dissection plug-in for Wireshark contributed
Wireshark plugin that provides dissection of SAP's NI, Message Server, Router, Diag, Enqueue, IGS, SNC and HDB protocols.