mprfgen is a multi-port memory generator that can be used for VHDL designs. It can generate either generic or Xilinx-specific (through component instantiation) multi-port memories.
KCPSM3 Assembler is an alternative implementation of the KCPSM3 assembly language for Xilinx PicoBlaze written in portable C. Its main target is the Linux OS.
An IDE for HTML, Bash, Perl, PHP, C, etc.
An out-of-core STL implementation.