There are a number of commercial or for-profit entities that are often confused with similarly-named or widely-used open source projects or products. This listing is a very brief selection of some of the major commercial entities people might think of, to serve as an example of some companies that are not in the foundations listing.
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Progress Chef
https://www.chef.io/
Notable Project(s): Chef; Progress
Progress Chef is the new Chef Software, Inc., main driver of the Chef line of defops tools. -
Red Hat, Inc.
https://www.redhat.com/
Notable Project(s): RHEL; Fedora
Red Hat Enterprise Linux (RHEL) is the commercially supported version built atop the open source Fedora project. -
Docker, Inc.
https://www.docker.com/
Notable Project(s): Docker
Docker has always been a commerical company with a number of open source provided tools. -
Mozilla Corporation
https://www.mozilla.org/
Notable Project(s): Firefox
Mozilla Corporation is a for-profit, wholly owned subsidiary of the Mozilla Foundation, a 501(c)3 non-profit. -
MariaDB plc
https://mariadb.com/
Notable Project(s): MariaDB
MariaDB plc is the current publicly traded commercial company building atop the open source MariaDB SQL database. -
SUSE Software Solutions Germany GmbH
https://www.suse.com/
Notable Project(s): SUSE Linux Enterprise; openSUSE
SUSE supports commercial Linux distros atop the openSUSE project.