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Although the creator of scrypt has written an "example implementation", it doesn't satisfy the "simple library" requirement that prompts developers to implement it. Therefore, I've written my adaptation, which quite simply pulls the relevant parts from the original implementation, then adds a number of harnesses and simplified interfaces. The hope is that through this, any developer can utilise scrypt.

libtasn1 library was developed for ASN1 (Abstract Syntax Notation One) structures management. The main features of this library are: - on-line ASN1 structure management that does not require any C code file generation; - off-line ASN1 structure management with C code file generation containing an array; - DER (Distinguish Encoding Rules) encoding; - no limits for INTEGER and ENUMERATED values

Lynis is an auditing tool for Unix (specialists). It scans the system and available software, to detect security issues. Beside security related information it will also scan for general system information, installed packages and configuration mistakes. This software aims in assisting automated auditing, software patch management, vulnerability and malware scanning of Unix based systems. It can be run without prior installation, so inclusion on read only storage is no problem (USB stick, cd/dvd).

Super is a setuid-root program that offers: o restricted setuid-root access to executables, adjustable on a per-program and per-user basis; o a relatively secure environment for scripts, so that well-written scripts can be run as root (or some other uid/gid), without unduly compromising security. The design philosophy behind super is two-fold: (a) some users can be trusted when executing certain commands; (b) there are some commands, such as a script to mount CDROM's, which you'd like to be safely executable even by users who are NOT trusted. Although setuid-root scripts are insecure, a good setuid-root wrapper around a sensible non-setuid script can be hard to break, and super provides that wrapper so that even a non-trusted user can use the scripts.

NASL is a scripting language designed for the Nessus security scanner. Its aim is to allow anyone to write a test for a given security hole in a few minutes, to allow people to share their tests without having to worry about their operating system, and to garantee everyone that a NASL script can not do anything nasty except performing a given security test against a given target. Thus, NASL allows you to easily forge IP packets, or to send regular packets. It provides you some convenient functions that will make the test of web and ftp server more easy to write. NASL garantees you that a NASL script : will not send any packet to a host other than the target host will not execute any commands on your local system NASL is not a powerful scripting language. Its purpose is to make scripts that are security tests. So, do not expect to write a third generation web server in this language, nor a file conversion utility. Use perl, python or whatever scripting language to do this.

Nettle is a cryptographic library that is designed to fit easily in more or less any context: In crypto toolkits for object-oriented languages (C++, Python, Pike, ...), in applications like LSH or GNUPG, or even in kernel space.

py-bcrypt is a Python wrapper of OpenBSDs Blowfish password hashing code, as described in A Future-Adaptable Password Scheme by Niels Provos and David Mazieres.

This library implements Blowfish, DES, and Triple-DES.

OpenBSM is an open source implementation of Sun's Basic Security Module (BSM) Audit API and file format. BSM, the de facto industry standard for Audit, describes a set of system call and library interfaces for managing audit records, as well as a token stream file format that permits extensible and generalized audit trail processing. OpenBSM extends the BSM API and file format in a number of ways to support features present in the Mac OS X and FreeBSD operating systems, such as Mach task interfaces, sendfile(), and Linux system calls present in the FreeBSD Linux emulation layer.

OpenBSM is an open source implementation of Sun's Basic Security Module (BSM) Audit API and file format. BSM, the de facto industry standard for Audit, describes a set of system call and library interfaces for managing audit records, as well as a token stream file format that permits extensible and generalized audit trail processing. OpenBSM extends the BSM API and file format in a number of ways to support features present in the Mac OS X and FreeBSD operating systems, such as Mach task interfaces, sendfile(), and Linux system calls present in the FreeBSD Linux emulation layer.