> pwr is most popular R package for calculating sample size

Package	Purpose	Method	Function
pwr	Effect size calculation	Calculate the conventional effect size for the tests	cohen.ES
		Chi-squared test of goodness of test for two sets of k probabilities	ES.w1
		Chi-squared test of association for two-way contingency	ES.w2
		Two proportions test	ES.h
	Sample Size or Power Calculation	One proportion test	pwr.p.test
		Two proportions test with same sample size	pwr.2p.test
		Two proportions test with different sample size	pwr.2p2n.test
		T-test 1. one sample 2. two independent samples with same sample size 3. aired sample	pwr.t.test
			pwr.t.test
			pwr.t.test
			pwr.t.test
		T-test: two independent samples with different sample size	pwr.t2n.test
		Balanced ANOVA	pwr.anova.test
		Correlation test	pwr.r.test
		Chi-squared test	pwr.chisq.test
		General Linear Model	pwr.f2.test

* table made: 2020/06/08

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> Other R packages for calculating sample size

Package	Method	R document
TrialSize	functions and examples in Sample Size Calculation in Clinical Research.	Here
CRTSize	Cluster Randomized Trials	Here
longpower	Two-level Generalized Mixed Linear Model (GLMM)	Here
samplesizeCMH	Cochran-Mantel-Haenszel test (CMH)	Here
NPHMCe	Proportional Hazards Mixture Cure Model (PHMC)	Here
samplesize	1.T-test 2.Wilcoxon test	Here
WMWssp	Wilcoxon test	Here