Over The Window Kitchen Stuff Hooks

thingiverse

This set of hooks is designed to snap onto the top edge of a double or single hung household window's bottom sash. The hooks extend far enough for items clipped to them to clear a lower curtain and any residual water can drip onto the back part of a traditional kitchen sink. This was created in Onshape, where the design is freely available here: https://cad.onshape.com/documents/40e79892ff5bd33eba45cb57/w/2c8c2b6bbc846244c1cfd663/e/2afad98a1c96c43bc42b2f2e. Feel free to customize every aspect of this design to fit your specific needs and application. I highly recommend doing this, as downloading the STL provided here unless you know your window sash frame dimensions match mine exactly could lead to inaccuracies.