In FontForge use Element > Bitmap Strikes Available to generate bitmap data ready for export. Instant, with perfect output.
Correct me if I'm wrong, but bitmap strikes are primarily intended for providing hand-drawn versions of glyphs for resolutions where automatic rasterization may not be readable. The documentation is kind enough to remark that you may run into support issues if your font contains no outlines at all, which is perhaps why the rest of the tools mentioned settle for generating outlines for exported pixels when targeting TTF/OTF (I wrote a small explanation of the algorithm used in mine).
All in all, positive reception suggests that plenty of people found the tool to be an improvement over alternatives, but perhaps we all have our own standards.
I really like your tool. My comments are not criticism.
Perhaps you've misunderstood this thread of conversation? My initial comment was a reply to the OP's question "I wonder if we can get it to let you draw the fonts directly in the boxes" offering many other apps they can use right now to do that, rather than waiting for you to implement (or not) their request. That was all.
With regards to FontForge, I frequently use the Bitmap Strikes Available to generate bitmap fonts from outline fonts. That may be useful, or not, for readers of this thread. But I felt it important to correct your statement that FontForge was only good for hand-drawing bitmap fonts - which is definitely not the case.