SoftHSM is an implementation of a cryptographic store accessible through a PKCS#11 interface. You can use it to explore PKCS#11 without having a Hardware Security Module. It is being developed as a part of the OpenDNSSEC project. SoftHSM uses Botan for its cryptographic operations.
TTA-based Co-design Environment (TCE) is a toolset that provides a complete co-design flow from C programs down to synthesizable VHDL and parallel program binaries. Processor customization points include the register files, function units, supported operations, and the interconnection network.
fpgasm creates bare-metal FPGA designs without Verilog or VHDL. Traditionally, FPGAs are built using proprietary Verilog or VHDL language implementations provided by the vendor. fpgasm is to Verilog and VHDL as assembly language is to C++. It takes you all the way to the netlist, and is not just a translator to Verilog. Because of that, the total "make" time to a working fpga is seconds, not minutes. With fewer than ten reserved words, fpgasm syntax can be mastered in a few minutes. With FPGA assembler, you can focus on understanding the FPGA substrate and how your design should map onto it (instead of figuring out large and complicated tools).