I am currently working at Alma on Nest&Cut which is a software to optimize the placement of parts in sheets to reduce the material usage and optimize your costs. With nestandcut.com you can place more parts in your sheets and save money. You can try it for free without a credit card :)

Three things I like about stackoverflow (and stackexchange in general): the license currently used (cc by-sa 3.0 with attribution required), the possibility to download the databases of all stackexchange websites and the abscence of registrationwall.

Interesting Q/As related to the difficulties of having floatting point operations repeatable across platforms (CPU/OS/Compiler):

• Does any floating point-intensive code produce bit-exact results in any x86-based architecture?

• is boost::random::uniform_real_distribution supposed to be the same across processors?

• Difference in floating point arithmetics between x86 and x64

Interesting documents related to the C language:

• Understanding Integer Overflow in C/C++
• What every C programmer should know about undefined behavior

Interesting documents related to software licensing:

• SQLite page on copyright

Interesting documents related to memory, caches:

• What every programmer should know about memory

Interesting documents related to floats:

• Intermediate Floating-Point Precision by Bruce Dawson
• What every programmer should know about floating-point arithmetic

Related to structure packing:

• The Lost Art of Structure Packing

Related to C++:

• When does a C++ temporary object die?