Combine several bitmaps into (TrueType) font

Question

I have several (~200) small bitmap files with glyph images. How can I combine them to a single bitmap font file?

Actually, I need a TrueType font created from these bitmaps (with no curves, smoothing, vectorization or any transformations). It's a designer 'pixel' font, so it should have rough pixel edges and so on.

Answer 1

Maybe this or fontforge is of any help.

Answer 2

Or this?