Soundfont Librarian was a tool released by E-mu some time in the late 90's somewhere online. It wasn't really a full-scale soundfont editor, per se, but it had at least basic editing and management functionality for both .sbk and .sf2 soundfonts, including the ability to convert the former to the latter.
This program is actually where the heavily-circulated 1mgm.sf2 (official AWE32/64 'ROM Dump' soundfont) originated from. In fact, it seems that this soundfont originally existed to aid in the process of converting old AWE-era .sbks to the newer .sf2 format, instead of it being meant for general use.
Polyphone is a free and open-source software for editing sf2, sf3, sfArk and sfz soundfonts. A clean interface and convenient tools have been implemented to efficiently deal with small or big instruments. Polyphone is available in different languages...
If you just want one or two instruments from a large SoundFont then follow this procedure. Open the large multi-instrument SoundFont in Polyphone, then select Home, New, add a Title and Save (top left parallel bars), Save As. Go to the Presets of the original SoundFont, Right-Click the Preset you want (choose Copy) and switch to the new SoundFont, click Preset heading then Ctrl V to paste (the preset is now inside your new SoundFont as well as the required samples). Close the old soundfont and save the new one.
More optimized memory writing assembly routines. Fixed user interface bug in case of higher than normal(96) windows DPI setting. Fixed bug that enabled activating MOVNTQ memory writes without checking SSE/MMX+ support (only 32bit version affected, x64 capable CPUs all support at least SSE2).
Bassmidi VSTi is a portable VST 2.4 instrument/software MIDI synthesizer for Windows that is based on the Bass/BassMidi libraries by Un4Seen.
You need some SF2/SFZ soundfont(s) and a VST Host/DAW to use it. In the package both x86 and x64 versions are included for different x86/x64 hosts.
Using x86/x64 host bridges are not recommended.
Bass.dll and Bassmidi.dll have to be copied to the same (VST) directory as BassMidiVsti.dll.
Copying BassMidiVsti.vstxml is optional. It's only included for easier parameter customization.