Welcome to openmeteo.org
Openmeteo.org is a project devoted to the development of free hydrological and meteorological software and to the collection and distribution of free hydrological and meteorological data.
openmeteo.org/db, the international, public database with free hydro-meteorological data offers anyone the possibility to upload their own data.
Client software: Hydrognomon
Developed by the National Technical University of Athens since 1998, Hydrognomon is time series management and processing software for the demanding professional and amateur alike. A simple executable file with no dependencies, Hydrognomon is free software, available under the GNU General Public License version 3, runs under MS Windows and, with Wine, in i386 Unixes such as Linux on i386, and has its own website.
Server software: Enhydris
Hydrognomon uses plain text files to store data. Users and organizations who need a database to manage their time series but do not want to use the openmeteo.org database can use Enhydris: server software that keeps a database of measuring stations, instruments and time series, with a web interface. Enhydris is the software that powers the openmeteo database. It is distributed, which means that many organisations can keep their own server each but share a common portal. Enhydris is cross-platform free software, available under the GNU General Public License version 3. Enhydis has its own website where you can see it in action, download it, or read its documentation.
If you want to participate in the development of Hydrognomon or Enhydris or report bugs, please visit the developer area. There is also a documentation page with information on Enhydris installation, pthelma library functions etc.