Open Source Products used in Pinterest

Pinterest is a tool for collecting and organizing things you love. It is a social networking site where users could pin images and write a note for that. It is now currently serving billions of pages every month. Check out the open source products used in Pinterest.
http://pinterest.com/

Programming Languages used: Python, Java

Django is a high-level Python Web framework that encourages rapid development and clean, pragmatic design. https://www.djangoproject.com/

Hadoop is a framework for running applications on large clusters built of commodity hardware. http://hadoop.apache.org/

Redis is an advanced key-value store. http://redis.io/

Memcache is high-performance, distributed memory object caching system. http://memcached.org/

MySQL database is the world's most popular open source database http://www.mysql.com/

Solr is leader in search platform. It is highly scalable, providing distributed search and index replication. http://lucene.apache.org/solr/

Pyres - a Resque clone, it is an implementation of job queue in Python. https://github.com/binarydud/pyres

Android - Mobile operating system from Google. http://www.android.com

Reference:
http://www.infoq.com/presentations/Pinterest