This is my competitive programming journey.
atcoder/ AtCoder (dp-contest, ...)
codeforces/
problemset/ Problemset solutions, grouped by rating (800, 900, ...)
contests/ Live contest solutions, one folder per round
cses/ CSES Problem Set, grouped by section
leetcode/ LeetCode, prefixed with the problem number
spoj/ SPOJ
tlx/ TLX (OSN, TOC, TROC, Gemastik, topic practice, ...)
hackerrank/ HackerRank (CodeX, BCC bank soal, certification, ...)
bcc/ BCC: oprec, freepass, intern, warmup, bank soal
contests/ Other contests (Compfest, FindIT, GCW, ...)
learning/ Algorithm / data structure notes and practice
misc/ Solutions whose source problem is unknown
templates/ Starting template for new solutions
tools/ Helper programs (testcase generator, ...)
docs/ Reference documents