Hyper Estraier can be used to integrate full-text search into applications, using either the provided command line and CGI interfaces, or a C API.

Search::Xapian wraps most methods of most Xapian classes. The missing classes and methods should be added in the future. It also provides a simplified, more 'perlish' interface to some common operations.

Recoll finds documents based on their contents as well as their file names. It can search most document formats, but you may need external applications for text extraction. It can reach any storage place: files, archive members, email attachments, transparently handling decompression.

Xapers is a personal document indexing system, geared towards academic journal articles build on the Xapian search engine. Think of it as your own personal document search engine, or a local cache of online libraries. It provides fast search of document text and bibliographic data and simple document and bibtex retrieval.

Ugrep is a ultra fast searcher of file systems, text and binary files, source code, archives, compressed files, documents, and more.

While still being compatible with the standard GNU/BSD grep command-line options, ugrep supports fuzzy search as well as structured and (adjustable) colored output, piped through "less" for pagination. An interactive query UI allows refinement and has a built-in help (press F1). Ugrep implements multi-threaded and other techniques to speed up search, pattern-matching and decompression. Many pre-defined regexps ease searching e.g. C typdefs or XML attributes. Results can be output in several structured or self-defined formats.

libtocc is the engine of the Tocc project, a tag-based file management system. The goal of Tocc is to provide a better system for classifying files that is more flexible than classic file systems that are based on a tree of files and directories.

FSearch is a fast file search utility, inspired by Everything Search Engine. It is written in C and based on GTK3.

Swish-e is Simple Web Indexing System for Humans - Enhanced. Swish-e can quickly and easily index directories of files or remote web sites and search the generated indexes.

mlocate is a locate/updatedb implementation. The m stands for "merging": updatedb reuses the existing database to avoid rereading most of the file system, which makes it faster and does not trash the system caches as much. The locate(1) utility is intended to be completely compatible with slocate, and attempts to be compatible to GNU locate when it does not conflict with slocate compatibility.

Omega is a search application built on Xapian. It provides indexers and a CGI web search frontend.

Recoll finds documents based on their contents as well as their file names. It can search most document formats, but you may need external applications for text extraction. It can reach any storage place: files, archive members, email attachments, transparently handling decompression.

Plocate is a locate based on posting lists, completely replacing mlocate with a faster and smaller index. It is suitable as a default locate on your system.

Tocc is a tag-based file management system. This package contains the command line tool for interacting with libtocc.

This package provides a communication library for Nitrokey.

The Yubico PIV tool is used for interacting with the Privilege and Identification Card (PIV) application on a YubiKey. With it you may generate keys on the device, import keys and certificates, create certificate requests, and other operations. It includes a library and a command-line tool.

Libu2f-host provides a C library and command-line tool that implements the host-side of the Universal 2nd Factor (U2F) protocol. There are APIs to talk to a U2F device and perform the U2F Register and U2F Authenticate operations.

Cardpeek is a graphical tool to read the contents of ISO7816 smart cards. It is extensible with the LUA scripting language.

It supports the following type of cards:

• Bank cards (VISA, MasterCard, CB and UK Post Office Account cards)

• Passports and the Belgian identity card

• Transport cards (Navigo, MOBIB, RavKav and VIVA cards)

• Older GSM SIM cards without USIM data

• Vitale 2 Health card

• Moneo Electronic purse card

• Driver Tachograph cards

• OpenPGP Cards (beta)

It also has limited support for Mifare Classic compatible cards (Thalys card)

This application provides support for using private and governmental e-services, signing and encrypting DigiDoc documents, and configuring Estonian ID cards. It requires a running pcscd service and a compatible card reader.

Pkcs11-helper is a library that simplifies the interaction with PKCS#11 providers for end-user applications. PKCS#11 is published standard. PKCS#11 is the de-facto standard to access cryptographic devices

This Python library provides functionality for communicating with a Fast IDentity Online (FIDO) device over Universal Serial Bus (USB) as well as verifying attestation and assertion signatures. It aims to support the FIDO Universal 2nd Factor (U2F) and FIDO 2.0 protocols for communicating with a USB authenticator via the Client-to-Authenticator Protocol (CTAP 1 and 2). In addition to this low-level device access, classes defined in the fido2.client and fido2.server modules implement higher level operations which are useful when interfacing with an Authenticator, or when implementing a Relying Party.

SoftHSM 2 is a software implementation of a generic cryptographic device with a PKCS #11 Cryptographic Token Interface.

This application is developed and issued by the German government to be used for online authentication with electronic German ID cards and residence titles. To use this app, a supported RFID card reader or NFC-enabled smart phone and a running pcscd service are required.

This package includes the IFD driver for the cyberJack contactless (RFID) and contact USB chipcard readers.

nitrocli is a program that provides a command line interface for interaction with Nitrokey Pro, Nitrokey Storage, and Librem Key devices.