These databases on research funding are available for Max Planck researchers:
Research Professional is an online platform providing information on research funding opportunities available worldwide.
ELFI (ELektronische ForschungsförderInformationen) provides information on more than 11,000 programs on research funding (national and international).
The flyer MPDL Institutional Funding for Open Access Publications has been updated. It includes information about central agreements covering APCs out of MPG central funds and special conditions with some publishers offering Open Access options.
You may pick up the flyer at the library or visit https://www.mpdl.mpg.de/en/services/service-catalog/oa-goldpublishing.
To find information on current funding programs and grants you may use the database ELFI (ELektronische ForschungsförderInformationen) which is available for Max Planck researchers. The database contains 10000 programs and 4500 national and international funders.