Thanks to God, I completed my participation in #hacktoberfest2020 by DigitalOcean, where I successfully contributed in 4 open source projects! on different scales. (I have 3 more contributions in review process as well).
In FasterXML, LLC, (Jackson-databind).
My contribution was to Adding docs on using Builder pattern (https://github.com/FasterXML/jackson-databind/pull/2889)
In yWorks (yGuard)
My contribution was to fix +200 Warnings and Java-doc Errors, I solved the problem using power of regex. (https://github.com/yWorks/yGuard/pull/92)
With 🇧🇬 Preslav Mihaylov (Clean Architecture notes)
Also You can find my all contributions on my humble github account: https://github.com/Hassan-Elseoudy