Comparing Technologies Inside and Outside Google

Leading positions in some key technological fields have nominated Google the giant in the Internet industry. Now, the open source community and other companies are keeping up with Google in these fields. Here follows a comparison of published Google technologies and those developed outside of Google. I will update this list as I know more.

Development Tools	Inside Google	Outside Google	Remark
Code review	Mondrian	Rietveld	Both Mondrian and Rietveld are written by the inventor of Python
Infrastructure	Inside Google	Outside Google	Remark
Distributed File System	GFS	HDFS	Hadoop's distributed file system
		CloudStore	Formally known as Kosmos file system
File Format	SSTable	String Table	Hadoop's file format of entries of key-value pairs
Distributed Storage	Bigtable	Hypertable	Baidu is a main sponsor of Hypertable.
		HBase	A Hadoop sub-project as an alternative of Bigtable.
Parallel Computing	MapReduce	Hadoop	Hadoop was initiated by guys formally work in Google's MapReduce team.
Remote Procedure Call	Protocol Buffer	Thrift	Thrift was developed by Facebook and is now an Apache project.
Data Warehouse	Dremel	Hive	Hive was developed by Facebook and is now an Apache Hadoop project.
API	Inside Google	Outside Google	Remark
Networking	(I do not know)	boost.asio	boost.asio provides an C++ abstraction to network programming