Ghidra is a software reverse engineering (SRE) framework
Enigma Encryption Simulator in Java
The SpotBugs plugin for security audits of Java web applications
Free GUI replacement for Java command-line utilities keytool/jarsigner
Secure wiping/shredding of free disk space with many methods
cross-platform (Java) file encryption and archiving tool
cross-platform, encryption application
Java application for encryption
A SigV4 authentication plugin for the open-source DataStax Java Driver
Mkpass - Command line Secure Password Generator
A command line interface for encryption and decryption using the NTRU
FinalCrypt - Unbreakable One-Time Pad Encryption
a free cross platform checksum utility, supports 58+ hash algorithms
SSL certificates statistics tool to see what are issueing CAs
Java Encryption Utility.
A Windows password cracker based on rainbow tables
simple and light-weight archive password cracker
Generates Latin squares and counts their transversals