1.floci-io / floci
Light, fluffy, and always free - The AWS Local Emulator alternative
+3,211 stars
from 26,376 · score 8.07
Trending repositories
Ranked by Attention Score: stars gained over the last 30 complete days
37 repositories by Attention Score · Oct 6, 2026 – Nov 4, 2026 (UTC)
2.axllent / mailpit
An email and SMTP testing tool with API for developers
- email-testing
- go
- golang
- smtp-server
- smtp-relay
- smtp-testing
- +2 more
+308 stars
from 10,535 · score 5.73
3.mswjs / msw
The industry standard for API mocking in JavaScript.
+80 stars
from 18,251 · score 4.39
4.typicode / json-server
Get a full fake REST API with zero coding in less than 30 seconds (seriously)
+54 stars
from 75,677 · score 4.01
5.stretchr / testify
A toolkit with common assertions and mocks that plays nicely with the standard library
+49 stars
from 26,195 · score 3.91
6.mockoon / mockoon
Mockoon is the easiest and quickest way to run mock APIs locally. No remote deployment, no account required, open source.
+43 stars
from 8,426 · score 3.78
7.godot-gdunit-labs / gdUnit4
Embedded unit testing framework for Godot 4 supporting GDScript and C#. Features test-driven development, embedded test inspector, extensive assertions, mocking, scene testing.
- test-automation
- testing
- testing-tools
- unit-test
- unittest
- unittest-framework
- +6 more
+41 stars
from 1,248 · score 3.74
+40 stars
from 16,162 · score 3.71
9.karatelabs / karate
Test Automation Made Simple
- test-automation
- assertions
- testing-tools
- mock-server
- automated-testing
- webdriver
- +10 more
+35 stars
from 8,970 · score 3.58
10.nock / nock
HTTP server mocking and expectations library for Node.js
+11 stars
from 13,124 · score 2.48
+11 stars
from 6,403 · score 2.48
12.tarampampam / webhook-tester
🔭 Powerful tool for testing WebHooks and more
+11 stars
from 541 · score 2.48
13.oguimbal / pg-mem
An in memory postgres DB instance for your unit tests
- hacktoberfest
- pg-promise
- typeorm
- node-postgres
- pg-mem
- postgresql
- +9 more
+10 stars
from 2,368 · score 2.40
14.mccutchen / go-httpbin
A reasonably complete and well-tested golang port of httpbin, with zero dependencies outside the go stdlib.
+10 stars
from 884 · score 2.40
15.mockito / mockito
Most popular Mocking framework for unit tests written in Java
- mockito
- java
- mocking-framework
- testing-tools
- mocking
- mock
- +6 more
+7 stars
from 15,440 · score 2.08
16.sj26 / mailcatcher
Catches mail and serves it through a dream.
+6 stars
from 6,778 · score 1.95
17.bblimke / webmock
Library for stubbing and setting expectations on HTTP requests in Ruby.
+6 stars
from 4,047 · score 1.95
18.kevin1024 / vcrpy
Automatically mock your HTTP interactions to simplify and speed up testing
+5 stars
from 3,017 · score 1.79
19.maxbrunsfeld / counterfeiter
A tool for generating self-contained, type-safe test doubles in go
+4 stars
from 1,143 · score 1.61
20.specmatic / specmatic
Shift-left API Integration | Auto-fix integration drift before integration. Specmatic turns API specifications into executable contracts, continuously verifying that every change made by AI coding agents and engineers stays true to the desired behaviour. Ship AI-ready APIs 10x faster, from intent to implementation, with Spec-Driven API Development.
- contract-testing
- microservices
- contract-driven-development
- cdd
- specmatic
- asyncapi
- +10 more
+4 stars
from 397 · score 1.61
21.ardatan / graphql-tools
:wrench: Utility library for GraphQL to build, stitch and mock GraphQL schemas in the SDL-first approach
+3 stars
from 5,430 · score 1.39
+3 stars
from 4,443 · score 1.39
23.AliSoftware / OHHTTPStubs
Stub your network requests easily! Test your apps with fake network data and custom response time, response code and headers!
+2 stars
from 5,064 · score 1.10
24.APIs-guru / graphql-faker
🎲 Mock or extend your GraphQL API with faked data. No coding required.
+2 stars
from 2,711 · score 1.10
25.matryer / moq
Interface mocking tool for go generate
+2 stars
from 2,204 · score 1.10
+2 stars
from 2,077 · score 1.10
27.FakeItEasy / FakeItEasy
The easy mocking library for .NET
- mocking
- fake-objects
- dotnet
- dotnet-core
- hacktoberfest
+2 stars
from 1,852 · score 1.10
28.eranpeer / FakeIt
C++ mocking made easy. A simple yet very expressive, headers only library for c++ mocking.
+2 stars
from 1,370 · score 1.10
29.tonerdo / pose
Replace any .NET method (including static and non-virtual) with a delegate
- testing
- testing-framework
- isolation-framework
- dotnet
- dotnet-core
- csharp
- +1 more
+2 stars
from 1,104 · score 1.10
+2 stars
from 751 · score 1.10
31.xnbox / DeepfakeHTTP
DeepfakeHTTP is a web server that uses HTTP dumps as a source for responses.
- http-server
- dump
- dummy
- testing
- testing-tools
- test-automation
- +14 more
+2 stars
from 522 · score 1.10
32.travisjeffery / timecop
A gem providing "time travel", "time freezing", and "time acceleration" capabilities, making it simple to test time-dependent code. It provides a unified method to mock Time.now, Date.today, and DateTime.now in a single call.
+1 stars
from 3,424 · score 0.69
33.marmelab / json-graphql-server
Get a full fake GraphQL API with zero coding in less than 30 seconds.
- graphql
- graphql-server
- express-graphql
+1 stars
from 1,948 · score 0.69
34.kahlan / kahlan
:heavy_check_mark: PHP Test Framework for Freedom, Truth, and Justice
+1 stars
from 1,145 · score 0.69
35.pnuckowski / aioresponses
Aioresponses is a helper for mock/fake web requests in python aiohttp package.
+1 stars
from 555 · score 0.69
36.darklynx / request-baskets
HTTP requests collector to test webhooks, notifications, REST clients and more ...
- webhooks
- test-automation
- qa
- testing
- http-requests
- rest
- +3 more
+1 stars
from 430 · score 0.69
37.xhd2015 / xgo
All-in-one go testing library
+1 stars
from 430 · score 0.69