The Apache Projects Underground
Top-level projects by area · data: projects.apache.org
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Cayenne
CouchDB
JavaScript
Ignite
OFBiz
Arrow
C
Jackrabbit
Airavata
Avro
C
CXF
Camel
Daffodil
Scala
DataFusion
Python
Lucene
ORC
OpenJPA
PLC4X
C
PouchDB
JavaScript
Santuario
Solr
Axiom
Axis2
BVal
Calcite
Commons
Cordova
JavaScript
DataSketches
Druid
ECharts
JavaScript
Fortress
FreeMarker
Geronimo
Helix
HttpClient 5
HttpCore
Iceberg
IoTDB
Karaf
Libcloud
Python
NetBeans
PDFBox
POI
Phoenix
Polaris
Pony Mail
Python
PyLucene
C++
Ranger
SIS
Shiro
Solr Operator
Go
Superset
JavaScript
Synapse
Thrift
C
Tika
Tomcat
TsFile
Websh
C
Yetus
Bash
cTAKES
AGE
C
APR
C
Accumulo
ActiveMQ
Airflow
Python
Allura
Python
Ambari
Anakia
Annotator
JavaScript
Ant
AntUnit
Aries
Batik
SVG
Beam
Bigtop
BookKeeper
Brooklyn
CarbonData
Cassandra
Causeway
Celix
C
Chainsaw
CloudStack
Compress Ant
Curator
CycloneDX Ant
DataFu
DeltaSpike
Derby
Directory LDAP
Directory Server
Directory Studio
Doris
C++
Drill
Empire-db
EventMesh
FOP
Felix
Flex
ActionScript
Flink
Flume
Fluo
Fluo Recipes
Fluo YARN
FtpServer
Geode
Gobblin
Grails
Groovy
Groovy
Guacamole
C
Gump
Python
HBase
HTTP Server
C
Hadoop
Hive
Hop
Hudi
Impala
C++
InLong
Ivy
IvyDE
JAMES
JDO
JMeter
JSPWiki
Jena
Kafka
Scala
Kerby
Knox
Kudu
C++
Kylin
Linkis
Log4j
Lucene.Net
C#
MINA
Magpie
Python
Mahout
ManifoldCF
Maven
Maven Doxia
MyFaces
Mynewt
C
Neethi
NiFi
Nutch
OpenDAL
Rust
OpenMeetings
OpenNLP
OpenOffice
C++
OpenWebBeans
Ozone
Parquet
Pig
Pinot
Props Ant
Pulsar
Qpid
C++
Rat
Roller
Royale
ActionScript
SSHD
STeVe
Perl
Samza
Scala
Sandesha2
SeaTunnel
Serf
C
SkyWalking
Spark
Storm
Struts
Subversion
C
Syncope
TVM
C++
Tapestry
Tentacles
Texen
Tez
Tobago
TomEE
Torque
Traffic Server
C++
Turbine
Unomi
VCL
Bash
Velocity
Vysper
WSS4J
Whimsy
JavaScript
Whisker
Wicket
Woden
XG Commons
XML Commons Ext
XML Commons Res
XMLBeans
XMLSchema
Xalan C++
C++
Xalan Java
Xerces C++
C
Xerces Java
Xerces Perl
Perl
YuniKorn
Go
Zeppelin
ZooKeeper
bRPC
C++
log4cxx
C++
log4net
C#
log4php
PHP
mod_ftp
C
mod_perl
C
rivet
Tcl
Answer
Apisix
Artemis
Asterixdb
Atlas
Auron
Buildstream
Celeborn
Devlake
Dolphinscheduler
Dubbo
Fineract
Flagon
Fluss
Fory
Gluten
Gravitino
Hertzbeat
Hugegraph
Iggy
Johnzon
Juneau
Kvrocks
Kyuubi
Livy
Nuttx
Openwhisk
Paimon
Pekko
Ratis
Reqsign
Resilientdb
Rocketmq
Rya
Sdap
Sedona
Servicecomb
Shardingsphere
Shenyu
Singa
Sling
Sourcelume
SpamAssassin
Stormcrawler
Streampark
Streampipes
Systemds
Teaclave
Tinkerpop
Training
UIMA
Uniffle
Wayang
Cayenne
CouchDB
JavaScript
Ignite
OFBiz
Arrow
C
Jackrabbit
Airavata
Avro
C
CXF
Camel
Daffodil
Scala
DataFusion
Python
Lucene
ORC
OpenJPA
PLC4X
C
PouchDB
JavaScript
Santuario
Solr
Axiom
Axis2
BVal
Calcite
Commons
Cordova
JavaScript
DataSketches
Druid
ECharts
JavaScript
Fortress
FreeMarker
Geronimo
Helix
HttpClient 5
HttpCore
Iceberg
IoTDB
Karaf
Libcloud
Python
NetBeans
PDFBox
POI
Phoenix
Polaris
Pony Mail
Python
PyLucene
C++
Ranger
SIS
Shiro
Solr Operator
Go
Superset
JavaScript
Synapse
Thrift
C
Tika
Tomcat
TsFile
Websh
C
Yetus
Bash
cTAKES
AGE
C
APR
C
Accumulo
ActiveMQ
Airflow
Python
Allura
Python
Ambari
Anakia
Annotator
JavaScript
Ant
AntUnit
Aries
Batik
SVG
Beam
Bigtop
BookKeeper
Brooklyn
CarbonData
Cassandra
Causeway
Celix
C
Chainsaw
CloudStack
Compress Ant
Curator
CycloneDX Ant
DataFu
DeltaSpike
Derby
Directory LDAP
Directory Server
Directory Studio
Doris
C++
Drill
Empire-db
EventMesh
FOP
Felix
Flex
ActionScript
Flink
Flume
Fluo
Fluo Recipes
Fluo YARN
FtpServer
Geode
Gobblin
Grails
Groovy
Groovy
Guacamole
C
Gump
Python
HBase
HTTP Server
C
Hadoop
Hive
Hop
Hudi
Impala
C++
InLong
Ivy
IvyDE
JAMES
JDO
JMeter
JSPWiki
Jena
Kafka
Scala
Kerby
Knox
Kudu
C++
Kylin
Linkis
Log4j
Lucene.Net
C#
MINA
Magpie
Python
Mahout
ManifoldCF
Maven
Maven Doxia
MyFaces
Mynewt
C
Neethi
NiFi
Nutch
OpenDAL
Rust
OpenMeetings
OpenNLP
OpenOffice
C++
OpenWebBeans
Ozone
Parquet
Pig
Pinot
Props Ant
Pulsar
Qpid
C++
Rat
Roller
Royale
ActionScript
SSHD
STeVe
Perl
Samza
Scala
Sandesha2
SeaTunnel
Serf
C
SkyWalking
Spark
Storm
Struts
Subversion
C
Syncope
TVM
C++
Tapestry
Tentacles
Texen
Tez
Tobago
TomEE
Torque
Traffic Server
C++
Turbine
Unomi
VCL
Bash
Velocity
Vysper
WSS4J
Whimsy
JavaScript
Whisker
Wicket
Woden
XG Commons
XML Commons Ext
XML Commons Res
XMLBeans
XMLSchema
Xalan C++
C++
Xalan Java
Xerces C++
C
Xerces Java
Xerces Perl
Perl
YuniKorn
Go
Zeppelin
ZooKeeper
bRPC
C++
log4cxx
C++
log4net
C#
log4php
PHP
mod_ftp
C
mod_perl
C
rivet
Tcl
Answer
Apisix
Artemis
Asterixdb
Atlas
Auron
Buildstream
Celeborn
Devlake
Dolphinscheduler
Dubbo
Fineract
Flagon
Fluss
Fory
Gluten
Gravitino
Hertzbeat
Hugegraph
Iggy
Johnzon
Juneau
Kvrocks
Kyuubi
Livy
Nuttx
Openwhisk
Paimon
Pekko
Ratis
Reqsign
Resilientdb
Rocketmq
Rya
Sdap
Sedona
Servicecomb
Shardingsphere
Shenyu
Singa
Sling
Sourcelume
SpamAssassin
Stormcrawler
Streampark
Streampipes
Systemds
Teaclave
Tinkerpop
Training
UIMA
Uniffle
Wayang