Suggestions for QWorld

The following packages have something in common with the package QWorld. The packages are ordered in decreasing similarity.

Package tikz-relay: TikZ library for typesetting electrical diagrams
Package pmdraw: Draw elements of the diagram monoids
Package duotenzor: Drawing package for circuit and duotensor diagrams
Package circuitikz: Draw electrical networks with TikZ
Package tikzdotncross: Marking coordinates and crossing paths
Package tikzquads: A few shapes designed to be used with CircuiTikZ
Package ladder: Draw simple ladder diagrams using TikZ
Package tikz-sfc: Symbols collection for typesetting Sequential Function Chart (SFC) diagrams (PLC programs)
Package tikz-ladder: Draw ladder diagrams using TikZ
Package atomicreactions: Simple representation of atomic shell reactions and Bohr model
Package orbitals: Atomic subshell / orbital-box diagrams for LaTeX, with automatic electron filling following Hund’s rule and the Pauli principle
Package register-transfer-level: Easily generate high-quality, publication-ready RTL diagrams
Package quantikz: Draw quantum circuit diagrams
Package yquant: Typesetting quantum circuits in a human-readable language
Package string-diagrams: Create string diagrams with LaTeX and TikZ
Package tikz-mirror-lens: Spherical mirrors and lenses in TikZ
Package tikzphysics: TikZ-native shapes and anchors for classical physics diagrams
Package commutative-diagrams: CoDi: Commutative Diagrams for TeX
Package structmech: A TikZ command set for structural mechanics drawings
Package blochsphere: Draw pseudo-3D diagrams of Bloch spheres
Package kinematikz: Design kinematic chains and mechanisms
Package causets: Draw causal set (Hasse) diagrams
Package grafcet: Draw Grafcet/SFC with TikZ
Package adigraph: Augmenting directed graphs
Package corasdiagram: A LaTeX package for authoring CORAS risk management diagrams
Package messagepassing: Draw diagrams to represent communication protocols
Package reotex: Draw Reo Channels and Circuits
Package smartdiagram: Generate diagrams from lists
Package tikz-osci: Produce oscilloscope screen shots
Package syntaxdi: Create railroad syntax diagrams
Package braids: Draw braid diagrams with PGF/TikZ