The most reliable source is the official Fritzing GitHub parts repository. These are vetted by the community.
is an open-source hardware initiative that makes electronics accessible to everyone. As a designer, educator, or hobbyist, you use Fritzing to create clean, professional PCB layouts, schematics, and breadboard views. However, the default built-in parts library is limited. To unlock the full potential of the software, you need to master the Fritzing library download process. fritzing library download