Here is a list of all namespaces with brief descriptions:

[detail level 12345]

Nanswerer
▼Nsearx
Nanswerers
Nautocomplete
Nbabel_extract
►Nbotdetection
N_helpers
►Nconfig
CConfig
CFALSE
CSchemaIssue
Nhttp_accept
Nhttp_accept_encoding
Nhttp_accept_language
Nhttp_connection
Nhttp_user_agent
Nip_limit
Nip_lists
Nlink_token
Ndata
►Nenginelib
►Ntraits
CEngineTraits
CEngineTraitsEncoder
CEngineTraitsMap
CEngine
►Nengines	::1337x
N1337x
N9gag
Nahmia
Nannas_archive
Napkmirror
Napple_app_store
Napple_maps
Narchlinux
Nartic
Narxiv
Nask
Nbandcamp
Nbase
Nbilibili
Nbing
Nbing_images
Nbing_news
Nbing_videos
Nbpb
Nbrave
Nbt4g
Nbtdigg
Nccc_media
Nchefkoch
Ncommand
Ncore
Ncppreference
Ncrossref
Ncurrency_convert
Ndailymotion
Ndeepl
Ndeezer
Ndemo_offline
Ndemo_online
Ndestatis
Ndeviantart
Ndictzone
Ndigbt
Ndocker_hub
Ndoku
Nduckduckgo
Nduckduckgo_definitions
Nduckduckgo_extra
Nduckduckgo_weather
Nduden
Ndummy	-offline
Ndummy-offline
Nebay
Nelasticsearch
Nemojipedia
Nfdroid
Nflickr
Nflickr_noapi
Nfreesound
Nfrinkiac
Nfyyd
Ngenius
Ngentoo
Ngitea
Ngithub
Ngoodreads
Ngoogle
Ngoogle_images
Ngoogle_news
Ngoogle_play
Ngoogle_scholar
Ngoogle_videos
Nhackernews
Nhex
Nimdb
Nimgur
Nina
Ninternet_archive_scholar
Ninvidious
Njisho
Njson_engine
Nkickass
Nlemmy
Nlib_rs
Nlibretranslate
Nlingva
Nlivespace
Nloc
Nmastodon
Nmaterial_icons
Nmediathekviewweb
Nmediawiki
Nmeilisearch
Nmetacpan
Nmixcloud
Nmongodb
Nmoviepilot
Nmozhi
Nmrs
Nmullvad_leta
Nmwmbl
Nmysql_server
Nnpm
Nnyaa
Nodysee
Nopen_meteo
Nopensemantic
Nopenstreetmap
Nopenverse
Npdbe
Npeertube
Nphoton
Npinterest
Npiped
Npiratebay
Npixiv
Npkg_go_dev
Npodcastindex
Npostgresql
Npresearch
Npubmed
Npypi
Nqwant
Nradio_browser
Nrecoll
Nreddit
Nredis_server
Nrottentomatoes
Nrumble
Nscanr_structures
Nsearchcode_code
Nsearx_engine
Nseekr
Nsemantic_scholar
Nsepiasearch
Nseznam
Nsjp
Nsolidtorrents
Nsolr
Nsoundcloud
Nspotify
Nspringer
Nsqlite
Nstackexchange
Nstartpage
Nstract
Nsvgrepo
Ntagesschau
Ntineye
Ntokyotoshokan
Ntootfinder
Ntorznab
Ntranslated
Nunsplash
Nvimeo
Nvoidlinux
Nwallhaven
Nwikicommons
►Nwikidata
CWDAmountAttribute
CWDArticle
CWDAttribute
CWDDateAttribute
CWDGeoAttribute
CWDImageAttribute
CWDLabelAttribute
CWDURLAttribute
Nwikipedia
Nwolframalpha_api
Nwolframalpha_noapi
Nwordnik
Nwttr
Nwww1x
Nxpath
Nyacy
Nyahoo
Nyahoo_news
Nyandex_music
Nyep
Nyoutube_api
Nyoutube_noapi
Nyummly
Nzlibrary
►Nexceptions
CSearxEngineAccessDeniedException
CSearxEngineAPIException
CSearxEngineCaptchaException
CSearxEngineException
CSearxEngineResponseException
CSearxEngineTooManyRequestsException
CSearxEngineXPathException
CSearxException
CSearxParameterException
CSearxSettingsException
CSearxXPathSyntaxException
Nexternal_bang
Nexternal_urls
►Nflaskfix
CReverseProxyPathFix
►Ninfopage
CInfoPage
CInfoPageSet
Nlimiter
Nlocales
►Nmetrics
►Nerror_recorder
CErrorContext
►Nmodels
CCounterStorage
CHistogram
CHistogramStorage
CVoidCounterStorage
CVoidHistogram
►Nnetwork
►Nclient
CAsyncHTTPTransportNoHttp
CAsyncProxyTransportFixed
►Nnetwork
CNetwork
Nraise_for_httperror
CRequest
►Nplugins
Nahmia_filter
Ncalculator
Nhash_plugin
Nhostname_replace
Noa_doi_rewrite
Nself_info
Ntor_check
Ntracker_url_remover
Nunit_converter
CPlugin
CPluginStore
►Npreferences
CBooleanChoices
CBooleanSetting
CClientPref
CEnginesSetting
CEnumStringSetting
CMapSetting
CMultipleChoiceSetting
CPluginsSetting
CPreferences
CSearchLanguageSetting
CSetSetting
CSetting
CStringSetting
CValidationException
►Nquery
CBangParser
CExternalBangParser
CFeelingLuckyParser
CLanguageParser
CQueryPartParser
CRawTextQuery
CTimeoutParser
Nredisdb
Nredislib
►Nresults
CResultContainer
CTiming
CUnresponsiveEngine
►Nsearch
►Nchecker
N__main__
►Nbackground
CCheckerErr
CCheckerOk
CCheckerOther
CEngineErr
CEngineOk
►Nimpl
CChecker
CCheckerTests
CResultContainerTests
CTestResults
Nscheduler
►Nmodels
CEngineRef
CSearchQuery
►Nprocessors
►Nabstract
CEngineProcessor
CSuspendedStatus
►Noffline
COfflineProcessor
►Nonline
COnlineProcessor
►Nonline_currency
COnlineCurrencyProcessor
►Nonline_dictionary
COnlineDictionaryProcessor
►Nonline_url_search
COnlineUrlSearchProcessor
CSearch
CSearchWithPlugins
►Nsettings_defaults
CSettingsBytesValue
CSettingsDirectoryValue
CSettingSublistValue
CSettingsValue
Nsettings_loader
Nsxng_locales
Nunixthreadname
►Nutils
C_HTMLTextExtractor
C_HTMLTextExtractorException
C_NotSetClass
Nversion
Nwebadapter
►Nwebapp
CExtendedRequest
►Nwebutils
CCSVWriter
CJSONEncoder