Digital Signal Processing Block Diagram Compiler - user extendable to all DSP's, but presently supports only the TI C2000 family. Rich support for fixed point arithmetic, both saturated and unsaturated. Block diagram entry is via TinyCAD (included).
VirtuAL3101 provides a series of tools to develop effects using the AL3101 DSP from Alesis. It includes an assembler/disassembler, a simulator, an application generator with its graphical interface and various effects.