Section 1 of the manual describes user commands and tools, for example, file manipulation tools, shells, compilers, web browsers, file and image viewers and editors, and so on.

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bt-device
a bluetooth device manager
bt-network
a bluetooth network manager
bt-obex
a bluetooth OBEX client/server
bt2vrml
convert from voxels to VRML2.0
btattach
Attach serial devices to BlueZ stack
btcheck
Bittorrent downloaded data checker
btedit
Direct editing of BTREE records
bterm
framebuffer terminal emulator
btfs
mount torrent files or magnet links as a file system
bti-shrink-urls
convert URLs to a shorter form using a web service
bti
send a tweet to twitter.com from the command line
btmgmt
btmgmt: - A command-line interface of BlueZ for management Usage:
btmon
Bluetooth monitor
btop
BTOP - Resource monitor that shows usage and stats for processor, memory, disks, network and processes
btplay
Directly play video torrents using btfs
btraceback
wrapper script around gdb and bsmtp  
btrbk
backup tool for btrfs subvolumes
btrfs-balance-least-used
Feed least used data block groups to btrfs balance first.  
btrfs-heatmap
visualize the layout of data on your btrfs filesystem  
btrfs-orphan-cleaner-progress
show progress information about background deletion of btrfs subvolumes  
btrfs-search-metadata
lookup btrfs metadata  
btrfs-space-calculator
calculate usable and wasted space  
btrfs-usage-report
show a detailed usage report about your btrfs filesystem  
bts-retitle
- note your intention to package a RFP/adopt a RFA
bts-srcpkg
query bugs.debian.org for bugs in a source package
bts
developers' command line interface to the Debian Bug Tracking System
btscanner
ncurses-based scanner for Bluetooth devices
btt
analyse block i/o traces produces by blktrace  
btvirt
Bluetooth emulator
btwisted
Calculate the twisting in a B-DNA sequence
btyacc
an LALR(1) parser generator with support for backtracking
bubblefishymon
system load meter with ducks and fish
buble
Bublé - Fast ES2015 compiler for Node.js
bucardo
utility script for controlling the Bucardo program
buckle
Nostalgia bucklespring keyboard sound
buddy-ng
a tool to work with easside-ng
budgie-control-center
Configure Budgie settings
budgie-daemon
budgie process to interface with various budgie and GNOME dbus interfaces
budgie-desktop-settings
Settings window for budgie-desktop
budgie-desktop
central entry point from gnome-session to display the graphical interface
budgie-extras-daemon
dbus and keybinding capabilities
budgie-panel
graphical component that display budgie widgets
budgie-run-dialog
user invoked application to quickly search and execute applications
budgie-wm
wrapper around libmutter that forms the window management for budgie
buffer
very fast reblocking program
bugmenot
elvi - surfraw(1) search tools  
bugpoint-13
bugpoint - automatic test case reduction tool
bugpoint-14
bugpoint - automatic test case reduction tool
bugpoint-15
bugpoint - automatic test case reduction tool
bugpoint-16
bugpoint - automatic test case reduction tool
bugpoint
automatic test case reduction tool
bugsx
display and evolve biomorphs
bugz
command line interface to bugzilla
bugzilla
command line tool for interacting with Bugzilla
bugzilla
elvi - surfraw(1) search tools  
buici-clock
attractive X11 clock
build-astrometry-index
Create astrometry.net index files
build-openstack-debian-image
build a Debian image to be used with OpenStack
build-publicfile
publicfile-installer - get, build and install publicfile
build-qmail
build binary qmail package
build-rdeps
find packages that depend on a specific package to build (reverse build depends)
build-simple-cdd
create custom debian-installer images
build_blast_atlas
visually comparing bacterial, plasmid, chloroplast, or mitochondrial sequences
build_blast_atlas_all_vs_all
visually comparing bacterial, plasmid, chloroplast, or mitochondrial sequences
buildah-add
Add the contents of a file, URL, or a directory to a container.  
buildah-build
Build an image using instructions from Containerfiles  
buildah-commit
Create an image from a working container.  
buildah-config
Update image configuration settings.  
buildah-containers
List the working containers and their base images.  
buildah-copy
Copies the contents of a file, URL, or directory into a container's working directory.  
buildah-from
Creates a new working container, either from scratch or using a specified image as a starting point.  
buildah-images
List images in local storage.  
buildah-info
Display Buildah system information.  
buildah-inspect
Display information about working containers or images or manifest lists.  
buildah-login
Login to a container registry  
buildah-logout
Logout of a container registry  
buildah-manifest-add
Add an image to a manifest list or image index.  
buildah-manifest-annotate
Add and update information about an image to a manifest list or image index.  
buildah-manifest-create
Create a manifest list or image index.  
buildah-manifest-exists
Check if the given manifest list exists in local storage  
buildah-manifest-inspect
Display a manifest list or image index.  
buildah-manifest-push
Push a manifest list or image index to a registry.  
buildah-manifest-remove
Remove an image from a manifest list or image index.  
buildah-manifest-rm
Removes one or more manifest lists.  
buildah-manifest
Create and manipulate manifest lists and image indexes.  
buildah-mount
Mount a working container's root filesystem.  
buildah-pull
Pull an image from a registry.  
buildah-push
Push an image, manifest list or image index from local storage to elsewhere.  
buildah-rename
Rename a local container.  
buildah-rm
Removes one or more working containers.  
buildah-rmi
Removes one or more images.  
buildah-run
Run a command inside of the container.  
buildah-source-add
Add a source artifact to a source image  
buildah-source-create
Create and initialize a source image  
buildah-source-pull
Pull a source image from a registry to a specified path  
buildah-source-push
Push a source image from a specified path to a registry.  
buildah-source
Create, push, pull and manage source images and associated source artifacts  
buildah-tag
Add additional names to local images.  
buildah-umount
Unmount the root file system on the specified working containers.  
buildah-unshare
Run a command inside of a modified user namespace.