https://atlasofsurveillance.org/ - Digging Police Tech with Open Source
https://bikesuite.org/ - Code-based key encapsulation mechanism
https://tinyssh.org/ - A minimalistic SSH server
https://openquantumsafe.org/ - Open-source quantum-resistant cryptography
https://cr.yp.to/ - Daniel J. Bernstein's Website!
https://classic.mceliece.org/index.html - The McElice Cryptosystem
https://www.openmined.org/ - Privacy friendly AI
https://www.openkeychain.org/ - OpenPgP for phones
https://keybase.io/ - Secure messaging and file-sharing
https://www.keylength.com/ - Cryptographic Key Length Recomendation
https://pypi.org/project/sourcedefender/ - Close source your python code!
https://osintframework.com/ - Resources for gathering information
https://ghidra-sre.org/ - Reverse engineering framework by the NSA! You Have Been Warned!
https://istio.io/ - Traffic management, policy enforcement, and telemetry collection
https://en.greatfire.org/ - Helping the Chinese people (and not the government) with human rights
https://operatorfoundation.org/ - Operator makes useable tools to help people around the world with censorship, security, and privacy.
https://ostif.org/ - Non-profit dedicated to securing open source apps
https://www.nucypher.com/ - Cryptographic Infrastructure for Privacy-Preserving Applications
https://tls.ulfheim.net/ - TLS Illustrated
https://www.alpertron.com.ar/ENGLISH.HTM - Useful Crypto calculators that use WebAssembly
https://www.cryptool.org/en/ - Set of Crypto tools that come handy during CTFs
https://cryptomator.org/ - Encryption for Cloud Data
http://cado-nfs.gforge.inria.fr/ - C/C++ implementation of the Number Field Sieve algorithm
https://lwn.net/Security/Index/ - Nice security Blog