Some of my favorites - Elasticsearch - https://github.com/elastic/elasticsearch https://github.com/elastic/elasticsearch Google's Guava - https://github.com/g

Some of my favorites - Elasticsearch - https://github.com/elastic/elasticsearch https://github.com/elastic/elasticsearch Google's Guava - https://github.com/google/guava https://github.com/google/guava Sourcegraph - https://github.com/sourcegraph/sourcegraph https://github.com/sourcegraph/sourcegraph Spectrum - https://github.com/withspectrum/spectrum https://github.com/withspectrum/spectrum Django - https://github.com/django/django https://github.com/django/django