Switzerland: Swiss National Science Foundation (SNF). Different opportunities for joint projects:

• CHIST-ERA: https://www.snf.ch/en/CYFGmk27ncOyYEMV/news/chist-era-2021-new-topics-for-european-projects (Deadline 17 Jan)
• SNF Weave/Lead Agency (Belgium, Germany, Croatia, Luxembourg, Austria, Poland, Slovenia and Czech Republic): https://www.snf.ch/en/j3eRKmgqIrepqJnT/funding/projects/weave-lead-agency  (Submission deadlines vary)
• SNF Co-investigator scheme (Denmark, Norway, Sweden and the Netherlands): https://www.snf.ch/en/uRl33AS5xngz6MO6/funding/projects/international-co-investigator-scheme (Deadlines: 1st Oct and 1st April)
• https://ec.europa.eu/programmes/horizon2020/en/h2020-section/spreading-excellence-and-widening-participation