what Graphical DSP programming tools are there for ASIO4ALL?
ASIO4ALL is a hardware independent low latency ASIO driver for WDM audio devices. As being a (wrapper) driver it does not support programming other but change of settings (device/channels selection, bit depth, sample rate, I/O buffers (latency)) through control software.
Regarding DSP programming tools, could you mean Creative/SoundBlaster specific kxproject driver/software?
Edit 1:
Creative/SoundBlaster DSP chips are listed here.
There are also software based methods as well as like EqualizerAPO  (system-wide equalizer for Windows) which lets you route channels, EQ filtering, convolution etc..