Here is the list of some of the good tutorials written by codeforces users :-
C++
- C++ Tricks by HosseinYousefi
- C++ STL: map and set by adamant
- C++ STL: Policy based data structures by adamant

Data Structures
- Algorithm Gym :: Data Structures by PrinceOfPersia
- Everything about Segment Trees by PrinceOfPersia
- Efficient and easy Segtree by Al.Cash
- A simple introduction to "Segment tree beats" by jiry_2
- Sack(DSU on trees) by Arpa
- SQRT Tree by gepardo
- Link-Cut tree by adamant
- Easy implementation of Compressed 2D Binary Indexed Tree for grid of binary numbers by sdnr1
- Introduction to New Data Structure: Wavelet Trees by rachitiitr
- [Tutorial] Searching Binary Indexed Tree in O(log(N)) using Binary Lifting by sdnr1
- An alternative sorting order for Mo's algorithm by gepardo
- How can we perform segment queries with Palindromic Tree? by duckladydinh
- Easy and (Semi)Efficient Dynamic Segment Trees (with Policy Hash Tables) by Chilli
- 2D Range Minimum Query in O(1) by fnf47

DP
- DP on Trees by darkshadows
- SOS DP by usaxena95
- Recurrent Sequences — Application of combinatorics in DP by TooNewbie
- Non-trivial DP tricks & Techniques by zscoder
- Digit DP by flash_7
- Optimized solution for Knapsack problem by sdnr1
- Dp On Trees by AghaTizi

Math
- Invariants and monovariants by TooNewbie
- Mobius Inversion by Nisiyama_Suzune
- Dirichlet convolution by Nisiyama_Suzune
- Fast convolution for 64-bit integers by quasisphere
- Tutorial for FFT/NTT Part 1 by sidhant
- Tutorial for FFT/NTT Part 2 by sidhant
- On Fast Fourier Transform by adamant
- Extended Eratosthenes Sieve by lucyanna2018
- Burnside Lemma by flash_7
- 2 Special cases of Gaussian by MazzForces
- Number of Solutions to a Linear Algebraic Equation by J-C
- Rolling hash and 8 interesting problems by dmkz
- Avoid overflow in linear diophantine equation by Jakube
- [Tutorial] Chinese Remainder Theorem by Valiors
- Linear Recurrence and Berlekamp-Massey Algorithm by TLE
- A blog on the Sprague-Grundy Theorem by sirknightingfail
- Schonhage-Strassen (FFT-based integer multiplication) tutorial by sammyMaX

String Processing
- Z algorithm by paladin8
- Suffix Automata by quasisphere
- Transition between Z- and prefix functions by adamant
- Manacher's algorithm and code readability by adamant

Geometry
- Quaternion algebra and geometry by adamant
- Slope Trick by zscoder
- Nearest Neighbor Search by P_Nyagolov
- Convex Hull trick and Li chao tree by adamant
- Geometry: 2D points and lines by Al.Cash
- Geometry: Polygon algorithms by Al.Cash
- [Tutorial] Convex Hull Trick — Geometry being useful by meooow

Graphs
- 0-1 BFS by himanshujaju
- 2-SAT by HosseinYousefi
- Algorithm Gym :: Graph Algorithms by PrinceOfPersia
- On Euler tour trees by ifsmirnov
- 'Meet in the middle' with shortest path problems of unweighted graph by tantam75
- Vertex cover and 2-SAT by irkstepanov
- Add edges to a digraph to make it strongly connected by chaotic_iak

Others
- Parallel Binary Search by himanshujaju
- General ideas and tricks by adamant
- Some Tutorials -- Or attempts at it :P by RestingRajarshi

If you know some good tutorial on codeforces which is not in this list and another list provided below please mention it in the comments I will add that in the list.

Another Similar List
Good Blog Post Resources about Algorithm and Data Structures