This report summarizes the major types of analysis conducted on electric distribution systems along with their applications and relative maturity levels. Special emphasis is placed on distribution system analyses (DSAs) required for increasing levels of distributed energy resources (DERs). This report is intended to be a resource for those interested in increasing their understanding of current capabilities and gaps in the basic types of DSA, more advanced emerging DSA capabilities, DSA as applied to DERs, and DSA as a way to enable or support market activities on the distribution system. The authors of this report reviewed publicly available information on eight of the most commonly used commercially available DSA tools and two open-source research DSA tools. The authors also drew on their experience to categorize and characterize the types of DSA and their maturity levels.