ETH for Development (ETH4D) supports ETH bachelor students, master students, doctoral candidates, post-?docs and senior scientists to develop prototypes. The grant sum is up to CHF 5 thousand. Preference is given to activities in lower-?middle-income countries with direct involvement of collaborating institutions or agencies from said countries. There are four application deadlines per year: 31 March, 30 June, 31 October and 31 December.