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
24 repositories by Attention Score · Aug 6, 2026 – Nov 3, 2026 (UTC)
2.keploy / keploy
Open-source platform for creating safe, isolated production sandboxes for API, integration, and E2E testing.
- testing
- test-automation
- api-testing
- testing-tools
- test-automation-framework
- test-generation
- +8 more
+1,194 stars
from 18,086 · score 7.09
3.google / googletest
GoogleTest - Google Testing and Mocking Framework
+931 stars
from 38,769 · score 6.84
4.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
5.mswjs / msw
The industry standard for API mocking in JavaScript.
+254 stars
from 18,076 · score 5.54
6.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
7.stretchr / testify
A toolkit with common assertions and mocks that plays nicely with the standard library
+173 stars
from 26,069 · score 5.16
8.getmoto / moto
A library that allows you to easily mock out tests based on AWS infrastructure.
+143 stars
from 8,590 · score 4.97
+136 stars
from 16,064 · score 4.92
10.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
11.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
+111 stars
from 7,307 · score 4.72
13.YMFE / yapi
TranslatedYApi is a visual API management platform that can be deployed locally and connects front-end, back-end, and QA
- api
- api-manager
- api-management
- api-test
+52 stars
from 27,647 · score 3.97
14.vektra / mockery
A mock code autogenerator for Go
+45 stars
from 7,130 · score 3.83
15.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
16.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
18.DATA-DOG / go-sqlmock
Sql mock driver for golang to test database interactions
+25 stars
from 6,547 · score 3.26
19.sj26 / mailcatcher
Catches mail and serves it through a dream.
+20 stars
from 6,763 · score 3.04
20.Netflix / pollyjs
Record, Replay, and Stub HTTP Interactions.
+19 stars
from 10,232 · score 3.00
21.vcr / vcr
Record your test suite's HTTP interactions and replay them during future test runs for fast, deterministic, accurate tests.
+18 stars
from 6,064 · score 2.94
22.sinonjs / sinon
Test spies, stubs and mocks for JavaScript.
- stubs
- javascript
- tdd
- test-driven-development
- unit-testing
- sinon
- +2 more
+13 stars
from 9,739 · score 2.64
23.mockery / mockery
Mockery is a simple yet flexible PHP mock object framework for use in unit testing with PHPUnit, PHPSpec or any other testing framework. Its core goal is to offer a test double framework with a succinct API capable of clearly defining all possible object operations and interactions using a human readable Domain Specific Language (DSL).
+10 stars
from 10,714 · score 2.40
+5 stars
from 19,551 · score 1.79