The services described here are part of a large constellation of Drosophila-centric (but not exclusive!) tools & services within a larger software ecosystem. Here are some entry points to this ecosystem:

natverse, a comprehensive R-based library spearheaded by the Jefferis lab

navis like natverse but in Python, spearheaded by Philipp Schlegel

Connectome Annotation Versioning Engine (CAVE) highly customizable software tools for analysis of large-scale connectomics data

FlyWire user-friendly environment for visualization and proofreading of automated segmentation of the FAFB Drosophila dataset

Neuprint tools for analysis of the “hemibrain” adult Drosophila EM connectome

This diagram from the navis ecosystem documentation is also helpful: