What this site is for
Banjo Warrior covers one family and four instruments: the five-string, the tenor, the plectrum, and the four-string in Chicago tuning. That is the whole subject. Because it is the whole subject, every page can assume the short fifth string is sitting there — starting at the fifth fret, tuned above its neighbours instead of below them, and usually left open while the rest of the hand works. A site that also had to describe six strings in fourths could not write a sentence like that one.
The same narrowness is why rolls get their own engine here and chords do not get a strum pattern. It is also why a banjo page is the wrong place for most questions that are not about a banjo. Pointing you at the site that owns the question is more useful than a thin section written here for completeness.
Where to go instead
String WarriorOne instrument at a time is this site's entire method; there the same chord is drawn on twenty-odd necks at once, which is how you find out what a G-tuning shape turns into somewhere else.
Theory WarriorA roll is a right-hand pattern, and nothing here explains why the notes underneath it want to move where they do; that argument happens there, with no instrument in the way.
Keys WarriorYour fifth string sounds one pitch whatever you do. A paraphonic synth has the mirror-image problem — many keys, one shared circuit — and putting the two side by side makes both instruments' limits legible.
Ukulele WarriorThe banjolele lives there and not here: it has a banjo pot and a banjo head, but four reentrant nylon strings, and the strings are what decide which site owns an instrument.
Bass WarriorThe root your thumb keeps hammering is somebody else's whole job; that site is about the single line holding the bottom down while the rolls happen above it.
Mandolin WarriorTuned in fifths across doubled courses, so no banjo shape survives the trip — but the tune list is the same one you already know, note for note.
Guitar WarriorSix strings played in blocks rather than picked in patterns, and the quickest way to work out what the person backing your break is actually holding down.
Fiddle WarriorNo frets, a bow, and the melody most of the night; the fiddle usually states the tune you are about to take a break on, so its version is worth reading first.
Ear WarriorA drone string sounding the same pitch against every chord is a free interval lesson running under the whole tune. That site turns it into a drill and keeps the record of which distances get mistaken for each other.
Bluegrass WarriorThe banjo is one seat in a band, and that site is about the other four: who takes the break, who backs it, and when the roll should get out of the way.
Music Warrior NetworkRolls and the drone string are this site's whole subject; that site is the wide-angle map — every sister's subject in a sentence, so a banjo player with a theory question or a fiddle tune to learn knows which door to open.
Nashville WarriorMove the capo two frets and every chord name on the page is wrong while every number on it is still right. That site is the written argument for the way a banjo player already has to think about a key.
Mariachi WarriorAn ensemble that takes its drive from chords struck together rather than from one busy right hand. Reading how the pulse gets shared out is a quick way to see what your instrument is carrying alone.
Jazz WarriorNot a banjo tradition, and useful for exactly that: it is built on chords that move every two bars and substitute freely, where this music's strength is a progression holding still long enough for a roll to say something.
Country WarriorCountry seats the five-string too, but behind a singer rather than out front: a roll that fills the space the floor and the answers leave, and a damped vamp on the train beat where a roll would crowd the pulse. The right hand those parts assume is this site's whole subject.
Tres WarriorThe closest thing in the network to a roll that is harmonic rather than ornamental — a repeating right-hand figure that spells a chord out one course at a time, arrived at from Cuba instead of Appalachia.
Sitar WarriorThe fifth string is the network's other drone, and that is exactly why the comparison pays: one drone you pick as part of a roll, a dozen more you never touch and that answer the melody by themselves.
Oud WarriorA banjo's right hand repeats a pattern for the left hand to play against; an oud's plays one line with a risha and leaves the left hand to find the pitch unaided — about as far from the roll as a plucked string gets.
Cuatro WarriorAnother instrument whose identity lives in the right hand while the left stays comparatively simple — but where a roll picks one string at a time, the Venezuelan cuatro's hand closes on all four at once and the muting is the technique.
Charango WarriorYour fifth string sits above its neighbours and refuses to act like a bass note. A charango does that across a whole five-course neck, and builds its right hand from repeatable cells much as a roll is built — familiar logic, unfamiliar instrument.
Cavaquinho WarriorA roll is a right-hand pattern you learn as one thing; a batida is the same idea in a different music, written down with the same care. Reading someone else's answer to what the picking hand actually does is unusually transferable.
Gear WarriorRolls and tunings are ours. Heads, tone rings, and whether a resonator earns the weight it adds are priced and argued over there.
Blues WarriorBanjo repertoire leans on major-key tunes, which is the reason to look. That site lays the blues out as a form, bar by bar in any key, and marks which notes of the blues scale sit inside each bar's chord and which rub against it.
Flamenco WarriorA banjo roll keeps every note of the bar evenly spaced. A palo leans on five counts out of twelve instead, and that site marks which five for the soleá, the alegrías, the bulerías and the seguiriya.
Progression WarriorA capo tells you where the key is, not what the chords are doing in it. That site takes a typed chord line and writes a Roman numeral under each one, with the chords that step outside the key marked.
Pedal Steel WarriorA banjo in open G sounds a chord before the left hand touches it. The lap steel rings a C6 chord the same way, and that site charts where a bar finds every other chord on it and on both pedal steel necks.
Scales WarriorPlenty of banjo tunes are Mixolydian, the major scale with a lowered seventh. That site places Mixolydian among 49 modes and shows which ones sit one altered degree away from it.
Music Warrior AIA roll is learned with the right hand, and no assistant can play one for you. What an AI assistant can do through that site is look up a banjo chord's frets and the notes each voicing sounds, read from this network's data rather than guessed, with this site's page for the chord given as the source.
How the sites divide the work
Each instrument family has exactly one home, and kinship follows strings and tuning rather than the shape of the body. That is why the banjolele is filed under the ukulele despite the drum head, and why the four-string banjos are here despite having no fifth string: tenor, plectrum and Chicago share this instrument's scale, its bridge and its repertoire, and they are tuned within reach of each other.
String Warrior is the one site that does not work this way. It carries every instrument at once, which is what lets it lay the same chord across twenty necks side by side — something no single-family site here can do, and the reason this one does not try.
The list above is every sister open today. Others are still being built, and each joins the list the day it opens — never before, because a door onto a site no reader can use yet is worse than no door at all.