BearSSL is an implementation of the SSL/TLS protocol (RFC 5246) written in C. It aims at being correct and secure. In particular, insecure protocol versions and choices of algorithms are not supported, by design; cryptographic algorithm implementations are constant-time by default. It should also be small, both in RAM and code footprint. For instance, a minimal server implementation may fit in about 20 kilobytes of compiled code and 25 kilobytes of RAM.

mbed TLS, formerly known as PolarSSL, makes it trivially easy for developers to include cryptographic and SSL/TLS capabilities in their (embedded) products, facilitating this functionality with a minimal coding footprint.

The ASN.1 to C compiler takes ASN.1 module files and generates C++ compatible C source code. That code can be used to serialize the native C structures into compact and unambiguous BER/XER/PER-based data files, and deserialize the files back.

Various ASN.1 based formats are widely used in the industry, such as to encode the X.509 certificates employed in the HTTPS handshake, to exchange control data between mobile phones and cellular networks, to car-to-car communication in intelligent transportation networks.

OpenSSL is an implementation of SSL/TLS.

ACME protocol implementation in Python

Crypt::OpenSSL::Random is a OpenSSL/LibreSSL pseudo-random number generator

GnuTLS is a secure communications library implementing the SSL, TLS and DTLS protocols. It is provided in the form of a C library to support the protocols, as well as to parse and write X.509, PKCS #12, OpenPGP and other required structures.

Dehydrated is a client for obtaining certificates from an ACME server (such as Let's Encrypt) implemented as a relatively simple Bash script.

OpenSSL is an implementation of SSL/TLS.

The wolfSSL embedded SSL library (formerly CyaSSL) is an SSL/TLS library written in ANSI C and targeted for embedded, RTOS, and resource-constrained environments - primarily because of its small size, speed, and feature set. wolfSSL supports industry standards up to the current TLS 1.3 and DTLS 1.2, is up to 20 times smaller than OpenSSL, and offers progressive ciphers such as ChaCha20, Curve25519, NTRU, and Blake2b.

mbed TLS, formerly known as PolarSSL, makes it trivially easy for developers to include cryptographic and SSL/TLS capabilities in their (embedded) products, facilitating this functionality with a minimal coding footprint.

This package provides Guile bindings to GnuTLS, a library implementation the TLS protocol. It supersedes the Guile bindings that were formerly provided as part of GnuTLS.

This package provides Guile bindings to GnuTLS, a library implementation the TLS protocol. It supersedes the Guile bindings that were formerly provided as part of GnuTLS.

GNU libtasn1 is a library implementing the ASN.1 notation. It is used for transmitting machine-neutral encodings of data objects in computer networking, allowing for formal validation of data according to some specifications.

Certbot automatically receives and installs X.509 certificates to enable Transport Layer Security (TLS) on servers. It interoperates with the Let’s Encrypt certificate authority (CA), which issues browser-trusted certificates for free.

The Crypt::OpenSSL::Guess Perl module provides helpers to guess the correct OpenSSL include path. It is intended for use in your Makefile.PL.

This library provides a C99 implementation of SSL/TLS. It is designed to be familiar to users of the widely-used POSIX I/O APIs. It supports blocking, non-blocking, and full-duplex I/O. There are no locks or mutexes.

As it can be difficult to keep track of which encryption algorithms and protocols are best to use, s2n-tls features a simple API to use the latest default set of preferences. Remaining on a specific version for backwards compatibility is also supported.

OpenSSL is an implementation of SSL/TLS.

AWS libcrypto (aws-lc) contains portable C implementations of algorithms needed for TLS and common applications, and includes optimized assembly versions for x86 and ARM.

This package provides several themes for Tmux, the terminal multiplexer.

tmux is a terminal multiplexer: it enables a number of terminals (or windows), each running a separate program, to be created, accessed, and controlled from a single screen. tmux may be detached from a screen and continue running in the background, then later reattached.

This package provides tmux-based terminal divider.

xpanes or tmux-xpanes (alias of xpanes) commands have following features:

• Split tmux window into multiple panes.

• Build command lines & execute them on the panes.

• Runnable from outside of tmux session.

• Runnable from inside of tmux session.

• Record operation log.

• Flexible layout arrangement for panes.

• Display pane title on each pane.

• Generate command lines from standard input (Pipe mode).

This package provides a lightweight program for system monitoring in the status line of tmux.

The memory monitor displays the used and available memory.

The CPU usage monitor outputs a percent CPU usage over all processors. It also displays a textual bar graph of the current percent usage.

The system load average is also displayed.

Tmuxifier allows you to easily create, edit, and load layout files, which are simple shell scripts where you use the tmux command and helper commands provided by tmuxifier to manage Tmux sessions and windows.