Hyacc is an efficient and practical Yacc/Bison-compatible full LR(1)/LALR(1)/LR(0) and partial LR(k) parser generator in ANSI C based on Knuth and Pager's LR(1) algorithms. Generated parser can be used in open-source or commercial software.
pycrc is an easy to use CRC (cyclic redundancy check) calculator and C source codegenerator. The generated source code can be optimized for simplicity, speed or space. pycrc contains a long parameter list of common CRC models.
The program is self contained and does not require installation. Apart from a python installation, it does not require other libraries to be installed.