-
InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
If you are referring solely to fully-validating node implementation, then, yes, dcrd is currently the only fully-validating node implementation.
If you are more generally referring to nodes, there are a few wallet-like lightweight implementations based on Decred's rather secure implementation of Block Header Commitments.
Other examples are the wallet built into DEX (Decred's Peer-to-Peer Decentralized Exchange), and dcrlnd (Decred Lightning Network).
NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a more popular project.