Directory
Testing Library
User-centric UI test utilities
FreeCode review, testing & securitytesting-library.com
What it is
Family of packages for querying UI the way a user perceives it, by accessible role, label and visible text rather than by CSS class or component internals. Includes DOM Testing Library plus React, Vue, Angular and React Native bindings, and
user-event for realistic keyboard and pointer simulation.Why it earns a slot
Because queries go through accessible roles, a test fails when the AI ships a
div with an onClick instead of a real button, catching keyboard and screen-reader breakage as a free side effect.Getting started
npm install -D @testing-library/react @testing-library/user-event
Neighbourhood
How Testing Library sits against the rest of the atlas — swaps, companions and the tools builders actually save alongside it.
Also in Code review, testing & security
Aikido Security
aikido.devNot yet swept
All-in-one AppSec scanner
Free tier + paidCode review, testing & security
Developer free forever: 2 users, 10 repos, 2 container images, 1 domain, 250k protected requests/mo, 10 AI autofixes/mo; Basic $300/mo base for 10 users and 100 repos; Pro $600/mo for 200 repos; Advanced $600/mo for 500 repos; Enterprise custom
Open dossier
Arcjet
arcjet.comNot yet swept
In-app rate limiting and bot defence
PaidCode review, testing & security
No free plan as of 2026; Individual $25/app/mo; Startup $299/app/mo; Growth $799/app/mo; usage fees on top at $5 per 1M requests plus per-feature rates such as $0.50 per 1M for bot detection; 15-day trial
Open dossier
Bito
bito.aiNot yet swept
AI PR review agent
PaidCode review, testing & security
Team $12/seat/mo annually or $15 monthly; Professional $20/seat/mo annually or $25 monthly; both include 5,000 lines reviewed per seat per month, overage $5 per 1,000 lines; Enterprise custom; 14-day trial
Open dossier
Browserbase
browserbase.comNot yet swept
Hosted headless browser cloud
Free tier + paidCode review, testing & security
Free: 1 browser hour/mo; Developer $20/mo with 100 browser hours then $0.12/hr; Startup $99/mo with 500 hours then $0.10/hr; Scale custom with 250+ concurrent browsers
Open dossier