Python subclass of Random using an RTLSDR as the entropy seed. As of now, does not provide a CSPRNG. While changing the seeding for a Mersenne-Twister (what random() uses internally) should prevent attacks, this should not be used for functions that need cryptographically secure random numbers.
An open-source utility for Linux that uses an attached webcam to seed the kernel's random number generator for cryptographic purposes.
An open source utility for Linux that seeds the kernel's random number generator with data pulled from an attached microphone.
A daemon that adds noise to the Linux kernel's entropy pool to maintain a certain amount of randomness. Every little bit helps.