Wrong alternatives and similar gems

Based on the "Extra" category.
Alternatively, view Wrong alternatives based on common mentions on social networks and blogs.

vcr

9.1 4.9 L5 Wrong VS vcr

Record your test suite's HTTP interactions and replay them during future test runs for fast, deterministic, accurate tests.
Parallel Tests

8.5 6.4 L5 Wrong VS Parallel Tests

Ruby: 2 CPUs = 2x Testing Speed for RSpec, Test::Unit and Cucumber

Scout APM: A developer's best friend. Try free for 14-days

Scout APM uses tracing logic that ties bottlenecks to source code so you know the exact line of code causing performance issues and can get back to building a great product faster.

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timecop

8.3 4.6 L4 Wrong VS 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.
Spring

8.3 4.4 L4 Wrong VS Spring

Rails application preloader
mutant

7.3 8.4 L4 Wrong VS mutant

Automated code reviews via mutation testing - semantic code coverage.
Appraisal

6.2 3.6 L5 Wrong VS Appraisal

A Ruby library for testing your library against different versions of dependencies.
Ruby-JMeter

5.8 0.0 L5 Wrong VS Ruby-JMeter

A Ruby based DSL for building JMeter test plans
Knapsack

4.5 7.6 Wrong VS Knapsack

Knapsack splits tests evenly across parallel CI nodes to run fast CI build and save you time.
Zapata

3.9 0.0 L5 Wrong VS Zapata

An Automatic Automated Test Writer
rspec-side_effects

0.9 0.0 Wrong VS rspec-side_effects

RSpec extension for checking the side effects of your specifications.
power_assert

0.1 0.0 L2 Wrong VS power_assert

Power Assert for Ruby