Cytoscape is a powerful tool for visualizing and analyzing biological networks. Some useful packages for learners in the field of bioinformatics who are interested in using Cytoscape include:

1. CyREST: A RESTful API for Cytoscape that allows users to interact with Cytoscape programmatically using various programming languages such as Python and R.

2. RCy3: An R package that provides a bridge between R and Cytoscape, allowing users to create, manipulate, and visualize networks directly from R.

3. Cytoscape Automation: A collection of tools and resources for automating tasks in Cytoscape, such as creating layouts, applying styles, and running analysis workflows.

These packages can be helpful for beginners looking to explore the capabilities of Cytoscape in the context of bioinformatics.