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.

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

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.

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.

Xapian is a highly adaptable toolkit which allows developers to easily add advanced indexing and search facilities to their own applications. It supports the Probabilistic Information Retrieval model and also supports a rich set of boolean query operators.

Dataparksearch is a full featured web search engine. It has support for HTTP, HTTPS, ftp (passive mode), NNTP and news URL schemes, and other URL schemes with external parsers. It can tweak URLs with session IDs and other weird formats, including some JavaScript link decoding. Options to query with all words, all words near to each others, any words, or boolean queries. A subset of VQL (Verity Query Language) is supported.

Xapian is a highly adaptable toolkit which allows developers to easily add advanced indexing and search facilities to their own applications. It supports the Probabilistic Information Retrieval model and also supports a rich set of boolean query operators.

GNU Bool is a utility to perform text searches on files using Boolean expressions. For example, a search for "hello AND world" would return a file containing the phrase "Hello, world!". It supports both AND and OR statements, as well as the NEAR statement to search for the occurrence of words in close proximity to each other. It handles context gracefully, accounting for new lines and paragraph changes. It also has robust support for parsing HTML files.

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.

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

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.

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.

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.

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.

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

libfido2 provides library functionality and command-line tools to communicate with a FIDO device over USB, and to verify attestation and assertion signatures.

libfido2 supports the FIDO U2F (CTAP 1) and FIDO 2.0 (CTAP 2) protocols.

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

This is an OpenSSL provider to access hardware and software tokens using the PKCS#11 cryptographic token interface. Access to tokens depends on loading an appropriate PKCS#11 driver that knows how to talk to the specific token. The PKCS#11 provider is a connector that allows OpenSSL to make proper use of such drivers.

The pyscard smart card library is a framework for building smart card aware applications in Python. The smart card module is built on top of the PCSC API Python wrapper module.

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.

The Belgian eID middleware is required to authenticate with online services and sign digital documents with Belgian identity cards.

It requires a running pcscd service and a compatible card reader.

YubiKey Manager (Qt) is a graphical application for configuring any YubiKey over all USB interfaces. For a CLI alternative, refer to the python-yubikey-manager package.

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.