1.floci-io / floci
Light, fluffy, and always free - The AWS Local Emulator alternative
+10,628 stars
from 18,120 · score 9.27
Trending repositories
Ranked by Attention Score: stars gained over the last 90 complete days
35 repositories by Attention Score · Aug 6, 2026 – Nov 3, 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
+809 stars
from 10,015 · score 6.70
3.mswjs / msw
The industry standard for API mocking in JavaScript.
+254 stars
from 18,076 · score 5.54
4.typicode / json-server
Get a full fake REST API with zero coding in less than 30 seconds (seriously)
+214 stars
from 75,520 · score 5.37
5.stretchr / testify
A toolkit with common assertions and mocks that plays nicely with the standard library
+173 stars
from 26,069 · score 5.16
+136 stars
from 16,064 · score 4.92
7.mockoon / mockoon
Mockoon is the easiest and quickest way to run mock APIs locally. No remote deployment, no account required, open source.
+136 stars
from 8,332 · score 4.92
8.karatelabs / karate
Test Automation Made Simple
- test-automation
- assertions
- testing-tools
- mock-server
- automated-testing
- webdriver
- +10 more
+112 stars
from 8,892 · score 4.73
9.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
+106 stars
from 1,181 · score 4.67
10.kevin1024 / vcrpy
Automatically mock your HTTP interactions to simplify and speed up testing
+44 stars
from 2,978 · score 3.81
11.mockito / mockito
Most popular Mocking framework for unit tests written in Java
- mockito
- java
- mocking-framework
- testing-tools
- mocking
- mock
- +6 more
+43 stars
from 15,406 · score 3.78
12.nock / nock
HTTP server mocking and expectations library for Node.js
+32 stars
from 13,103 · score 3.50
+27 stars
from 6,387 · score 3.33
14.mccutchen / go-httpbin
A reasonably complete and well-tested golang port of httpbin, with zero dependencies outside the go stdlib.
+25 stars
from 868 · score 3.26
15.oguimbal / pg-mem
An in memory postgres DB instance for your unit tests
- hacktoberfest
- pg-promise
- typeorm
- node-postgres
- pg-mem
- postgresql
- +9 more
+24 stars
from 2,354 · score 3.22
16.sj26 / mailcatcher
Catches mail and serves it through a dream.
+20 stars
from 6,763 · score 3.04
17.FakeItEasy / FakeItEasy
The easy mocking library for .NET
- mocking
- fake-objects
- dotnet
- dotnet-core
- hacktoberfest
+18 stars
from 1,836 · score 2.94
18.matryer / moq
Interface mocking tool for go generate
+14 stars
from 2,192 · score 2.71
19.maxbrunsfeld / counterfeiter
A tool for generating self-contained, type-safe test doubles in go
+12 stars
from 1,135 · score 2.56
+7 stars
from 4,439 · score 2.08
21.bblimke / webmock
Library for stubbing and setting expectations on HTTP requests in Ruby.
+7 stars
from 4,046 · score 2.08
22.eranpeer / FakeIt
C++ mocking made easy. A simple yet very expressive, headers only library for c++ mocking.
+7 stars
from 1,365 · score 2.08
23.ardatan / graphql-tools
:wrench: Utility library for GraphQL to build, stitch and mock GraphQL schemas in the SDL-first approach
+6 stars
from 5,427 · score 1.95
24.richardszalay / mockhttp
Testing layer for Microsoft's HttpClient library. Create canned responses using a fluent API.
+6 stars
from 1,758 · score 1.95
+6 stars
from 747 · score 1.95
26.AliSoftware / OHHTTPStubs
Stub your network requests easily! Test your apps with fake network data and custom response time, response code and headers!
+5 stars
from 5,061 · score 1.79
27.Brightify / Cuckoo
Boilerplate-free mocking framework for Swift!
- mock
- mockito
- cuckoo
- stub
- swift
- matcher
- +4 more
+5 stars
from 1,739 · score 1.79
28.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.
+4 stars
from 3,421 · score 1.61
+4 stars
from 2,075 · score 1.61
30.WeTransfer / Mocker
Mock Alamofire and URLSession requests without touching your code implementation
- wt-branch-protection-two-approvals
- wt-branch-protection-exempt
+3 stars
from 1,187 · score 1.39
31.PSPDFKit-labs / bypass
Bypass provides a quick way to create a custom plug that can be put in place instead of an actual HTTP server to return prebaked responses to client requests.
- testing
- http
- https
- mock
- api-testing
- elixir
- +2 more
+3 stars
from 998 · score 1.39
32.APIs-guru / graphql-faker
🎲 Mock or extend your GraphQL API with faked data. No coding required.
+2 stars
from 2,711 · score 1.10
+2 stars
from 689 · score 1.10
34.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
35.kahlan / kahlan
:heavy_check_mark: PHP Test Framework for Freedom, Truth, and Justice
+1 stars
from 1,145 · score 0.69