Application | Service | License | Requirements | Similar proprietary web application(s) |
Collabora Online | Online office suite | MPLv2.0 | | Google Docs, Microsoft 365 |
Gallery | Photo sharing | GPLv3 | PHP + MySQL[1] | flickr, Picasa |
Piwigo | Photo sharing | GPL | PHP + MariaDB / MySQL[2] | flickr, Picasa |
OpenBroadcaster | Video streaming | AGPLv3+ | MySQL | YouTube |
Plumi | Video streaming | GPL | ZPL | | YouTube |
PeerTube | Video streaming | AGPLv3+ | | YouTube |
Libre.fm | Music streaming | AGPLv3+ | PostgreSQL or MySQL | last.fm |
CiteSeerX | Bibliographic database | Apache | MySQL or PostgreSQL | SpringerLink |
OpenStreetMap | Mapping | ODbL | MySQL or PostgreSQL | Google Maps |
ownCloud | File sharing/sync, web calendar, online office suite etc. | AGPLv3 | | Dropbox, drop.io |
Nextcloud | File sharing/sync, web calendar, online office suite etc. | AGPLv3+ | PHP + MariaDB / MySQL / Oracle / PostgreSQL / SQLite[3] | Dropbox, Google Drive, Microsoft 365, box |
Seafile | File sharing/sync, web calendar, online office suite etc. | GPLv2 | | Dropbox, drop.io |
Tahoe Least-Authority File Store | File sharing | GPLv2+ | | Dropbox, drop.io |
iFolder | File sharing | GPLv2+ | | Dropbox, drop.io |
AbiCollab | Online file editing | GPLv2 | MySQL or PostgreSQL | Google Docs |
Etherpad | Online file editing | Apache | MySQL or PostgreSQL | Google Docs |
Eucalyptus (computing) | Virtual machine provisioning | GPLv3 | | Amazon EC2 |
OpenNebula | Virtual machine provisioning | Apache | SQLite3 | Amazon EC2 |
DokuWiki | Wiki | GPLv2 | | Wikispaces |
MediaWiki | Wiki | GPLv2+ | MySQL or PostgreSQL | Wikispaces |
TiddlyWiki | Wiki | BSD license | Web browser | Evernote, Microsoft OneNote |
Open Journal Systems | Publication management | GPLv2 | MySQL or PostgreSQL | |
WordPress | Blogging | GPLv2 | PHP + MariaDB / MySQL[4] | blogger.com |
LiveJournal | Blogging | GPLv2+ | | blogger.com |
Ghost | Blogging | MIT License | JavaScript, node.js | blogger.com |
GNU Social | Distributed social network | AGPLv3 | MySQL or PostgreSQL | Twitter |
Mastodon | Distributed social network | AGPLv3 | PostgreSQL | Twitter |
AppScale | Virtual web hosting | BSD | | Google AppEngine |
PHPGroupware | Online office suite | GPLv2 | | Google Docs |
eGroupware | Online office suite | GPLv2 | | Google Docs |
Feng Office | Online office suite | AGPL | | Google Docs |
Roundcube | Web mail | GPLv3+ with exceptions for skins and plugins | | Gmail, Hotmail |
IMP | Web mail | GPLv2 | IMAP server | Gmail, Hotmail |
Squirrelmail | Web mail | GPLv2 | | Gmail, Hotmail |
Mailman | Mailing lists | GPL | | Google Groups, Yahoo Groups |
FluxBB | Forum | GPLv2 | | |
phpBB | Forum | GPLv2 | | |
MyBB | Forum | GNU LGPL | | |
Phorum | Forum | Phorum 2.0 | | |
Vanilla | Forum | GPLv2 | | |
Discourse | Forum | GPLv2+ | | |
LimeSurvey | Internet survey | GPLv2 | | SurveyMonkey, Google Form creator |
Tiny Tiny RSS | RSS reader | GPLv3 | | Google Reader |
pump.io | Social aggregation | Apache | | FriendFeed |
Meneame | Social news | AGPLv3 | | Digg |
Mixx | Social news | | | Digg |
Friendica | Distributed social network | MIT | | Facebook |
Diaspora | Distributed social network | AGPL | | Facebook |
BuddyPress | Distributed social network | GPL | WordPress | Facebook |
Elgg | Distributed social network | GPLv2 / MIT | | Facebook |
Scuttle | Social bookmarking | | | Delicious |
Connotea (discontinued) | Social bookmarking | | | Delicious |
Ma.gnolia 2 (discontinued) | Social bookmarking | | | Delicious |
Apertium | Translation | GPLv2 | | Google Translate |
EyeOS (version 2.5 and earlier) | Homepage | AGPLv3 | | iGoogle |
OpenCroquet | Virtual world | MIT | | SecondLife |
OpenSimulator | Virtual world | BSD | | SecondLife |
bitwarden | Password manager | GPLv3, AGPLv3 | node.js | Dashlane, LastPass |
Mattermost | Web chat | MIT, AGPLv3, Apache License 2.0 | | Slack |
Element | Web chat | Apache License 2.0 | | Slack |