KNIME nodes are not just available from KNIME alone. Many other companies and groups provide KNIME nodes. Some of them are listed here. (If you also provide KNIME nodes but cannot find your name here, please contact us.)
- Vendors who have a regular license agreement with KNIME.
- Companies that provide KNIME wrapper nodes in order to access their (mostly) proprietary/commercial tools
- Contributions from the open source community. (Be sure, however, to read the individual license agreements carefully.)