Alternatives to flex
Other tools in this directory that do similar work, with a verified install command for each. flex itself: install flex.
masscan
TCP port scanner, spews SYN packets asynchronously, scanning entire Internet in under 5 minutes
hey
HTTP load generator, ApacheBench (ab) replacement
Orca Slicer Nightly
G-code generator for 3D printers (Bambu, Prusa, Voron, VzBot, RatRig, Creality, etc.)
grype
A vulnerability scanner for container images and filesystems
oha
HTTP load generator · inspired by rakyll/hey with tui animation
swiftgen
The Swift code generator for your assets, storyboards, Localizable.strings, … — Get rid of all String-based APIs!
gdu
Fast disk usage analyzer with console interface written in Go
bumblebee
Read-only developer endpoint scanner for on-disk package, extension, and developer-tool metadata, built to check exposure to known software supply-cha
autorest
OpenAPI (f.k.a Swagger) Specification code generator. Supports C#, PowerShell, Go, Java, Node.js, TypeScript, Python
SuperSlicer
G-code generator for 3D printers (Prusa, Voron, Creality, etc.)
sbjson
This framework implements a strict JSON parser and generator in Objective-C
protoc-gen-doc
Documentation generator plugin for Google Protocol Buffers
lizard-analyzer
A simple code complexity analyser without caring about the C/C++ header files or Java imports, supports most of the popular languages
vivid
A themeable LS_COLORS generator with a rich filetype datebase
Mac Sai
Mac Sai: the open-source Mac cleaner, optimizer, and malware scanner. A free, Apple-notarized alternative to CleanMyMac, built with Swift 6 and SwiftU
mkp224o
vanity address generator for tor onion v3 (ed25519) hidden services
scrcpy
Display and control your Android device
go
The Go programming language
node
Node.js JavaScript runtime ✨🐢🚀✨
rust
Empowering everyone to build reliable and efficient software
typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output
openai-whisper
Robust Speech Recognition via Large-Scale Weak Supervision
deno
A modern runtime for JavaScript and TypeScript
neovim
Vim-fork focused on extensibility and usability
How we picked these
We match on what the tool does and how it installs, then order by how widely each project is used. We're not saying these are better or worse than flex — that depends on what you're building. We're saying they're the projects people reach for in the same situations, and each one has an install command we checked against its documentation.
flex is developed by its own authors and this page is an independent reference; we are not affiliated with or sponsored by any project listed, and nothing here is a paid placement.