Zenodo is described as 'Built and developed by researchers, to ensure that everyone can join in Open Science' and is an app in the Network & Admin category. There are five alternatives to Zenodo for Online / Web-based and Windows. The best alternative is Library Genesis, which is free. Other great apps like Zenodo are Sci-Hub (Free), arXiv (Free), LibreTexts (Free, Open Source) and Libgen Desktop (Free, Open Source).
arXiv® is a free distribution service and an open archive for scholarly articles in the fields of physics, mathematics, computer science, quantitative biology, quantitative finance, statistics, electrical engineering and systems science, and economics.