A handy lookup table of similar technology and services to help ex-googlers survive the real world :) pull-requests very welcomed. Please do not list any confidential projects!

For a working example of (some) of these technologies integrated together, see: https://github.com/google/startup-os

See also: System Design Primer, The Hadoop Ecosystem Table, Map AWS services to GCP products

Technology

Core Technology

Google Internal	Google External	Open Source / Real-World
MapReduce		Apache Hadoop, Spark
Protocol Buffer	Protobuf	Cap'n Proto, Thrift, Avro, Amazon Ion, CBOR
Stubby	gRPC	Thrift, Bolt
Chubby		Apache Zookeeper, etcd, HashiCorp Consul
Goops / PubSub		Apache Kafka, Apache Pulsar, Facebook LogDevice

Infrastructure

Google Internal	Google External	Open Source / Real-World
Borg	Kubernetes	Apache Mesos, Apache Aurora, HashiCorp Nomad
GSLB, GFE, Maglev, uberproxy		ELB, HAProxy, Istio, F5, envoy
uberproxy (sso proxy)		buzzfeed-sso Pomerium
data center hardware	open compute
Jupiter, Starblaze
B4, Stargate, TE
USPS, Andromeda

Storage

Google Internal	Google External	Open Source / Real-World
GFS/Colossus		HDFS, Ceph, GlusterFS, MooseFS
BigTable	Cloud BigTable	PrestoDB, Cassandra, HBase, Accumulo, DynamoDB, ScyllaDB
Spanner	Cloud Spanner	Vitess, CockroachDB, TiDB
ColumnIO / Capacitor		Apache Parquet
sstable	levelDB	RocksDB
zippy	Snappy	lz4

Services

Google Internal	Google External	Open Source	SaaS
Dremel	BigQuery	Apache Drill, Presto, Spark(sort-of),	AWS Athena, Redshift Spectrum, Snowflake
Dremel UI		Redash, Metabase, Apache Superset
Search (Mustang, Alexandria)		Elasticsearch, Solr, Lucene	algolia
pubsub	pubsub	NATS.io, RabbitMQ, PubNub	AWS SQS/SNS, AWS AppSync
Flume (Java)	Apache Beam	Apache Crunch
MillWheel	Cloud Dataflow	Apache Flink
Colab	Colaboratory	Jupyter
PLX	Google Data Studio		Mode

DevOps

Google Internal	Google External	Real-World
Assimilator		Dominator
Blaze	Bazel	Buck, Pants, please.build, Blade, recc
Oncall		PagerDuty, OpsGenie, VictorOps
varz/borgmon/monarch		Datadog, Prometheus, M3, librato, newrelic, skylight, scout, Scotty/tricorder, netdata, also this and this
Exception/Error Tracking (??)		Sentry.io, Raygun.io, Rollbar, Honeybadger, Airbrake, OverOps
styleguides	google styleguides	PEP-8, HoundCI auto-style-reviewer
Blaze/Forge/TAP/BuildCop	Cloud Build	buildkite, CircleCI, travis, jenkins, gitlabCI, github, Drone
Sandman(test env)/Guitar
Sisyphus / Rapid		Spinnaker, lambdaCD, screwdriver.cd, CodeShip, shipit-engine, GoCD, AWS CodeDeploy, Capistrano, Fabric, ConcourseCI, samson
borg / borgcfg / gcl	Jsonnet	AWS Cloudformation, Puppet, Chef, Salt, Ansible, Terraform, kubecfg, pulumi
logging, analog	StackDriver	logstash, fluentd, PaperTrail, cernan
CodeSearch	Zoekt	Sourcegraph, OpenGrok
Critique, Gerrit, Mondrian etc.	Gerrit	Reviewable , Phabricator
cider		Eclipse Che, Cloud9, gitpod.io, Coder, Code-Server (VSCode in a Tab)
buganizer	Google Issue Tracker	JIRA, bugzilla, github issues
ToTT	Google Test Blog	Increment
Copybara / MOE	Copybara, MOE
workflow/dependency management		Luigi, Airflow, digdag, Pachyderm, Dask
ErrorProne	ErrorProne	SpotBugs, FindBugs
dapper (distributed trace)	stackdriver trace	zipkin, opentracing, jaeger

Security

Google Internal	Google External	Open Source
prodaccess/LOAS		Keymaster
prod secrets/identity management		chamber, knox, SPIFFE

IT / Operations

Google Internal	Real-World
software engineering at google
valentine	1Password, Lastpass, pass
OWNERS files in repo	github CODEOWNERS
snippets	Khan/snippets
memegen	memegen
SnipIt	recordit, CloudApp, dropbox screenshots
edge, people ops training	LifeLabs
googlegeist	Culture Amp, humu, tinypulse, peakon
HRIS/ERP	Namely, BambooHR, Workday
stuff (SaaS IT management)	productiv, intello, zylo
stuff (Device Management)	Fleetsmith, jamf, rippling IT
device security monitoring	Red Canary
beyondcorp	beyondcorp
go/ links	golinks, go, Goat, trotto
google3 philosophy	innersource, monorepo
doing code review	code review
safely sharing 1-time secrets	croc, onetimesecret, privatebin
messaging	mattermost, Slack, gchat
peer bonus	bonus.ly, zestful
kudos	heytaco, slack ++ bot

also check out xoogler.co, which organizes events, slack channels etc

disclaimer: I'm not affiliated with any of the technologies mentioned above.

disclaimer: I left Google a number of years ago so some of the naming might be dated