Here is a list of all documented namespaces with brief descriptions:

Nactivations	Various activation functions used in Neural network
Nbacktracking	Backtracking algorithms
Ncaesar	Functions for Caesar cipher algorithm
Nciphers	Algorithms for encryption and decryption
Ncut_rod	Implementation of cutting a rod problem
Ndata_structures	Data Structures algorithms
Ndouble_hashing	An implementation of hash table using double hashing algorithm
Ndynamic_programming	Dynamic Programming algorithms
Ngeometry	Geometry algorithms
Ngraph	Graph algorithms
Nheavy_light_decomposition	Heavy light decomposition algorithm
Nhorspool	Functions for Horspool's algorithm
Nis_graph_bipartite	Functions for checking whether a graph is bipartite or not
Njarvis	Functions for Jarvis’s algorithm
Nkadane	Functions for Kadane algorithm
Nlayers	This namespace contains layers used in MLP
Nlinear_probing	An implementation of hash table using linear probing algorithm
Nlinked_list	Functions for singly linked list algorithm
Nmachine_learning	Machine learning algorithms
Nmedian_search	Functions for Median search algorithm
Nmerge_insertion	Combined Intersion-Merge sorting algorithm
Nn_queens	Functions for Eight Queens puzzle
Nn_queens_all_solutions	Functions for Eight Queens puzzle with all solutions
Nneural_network	Neural Network or Multilayer Perceptron
Nqr_algorithm	Functions to compute QR decomposition of any rectangular matrix
Nquadratic_probing	An implementation of hash table using quadratic probing algorithm
Nrange_queries	Algorithms and Data Structures that support range queries and updates
Nsearch	Search algorithms
Nshortest_common_supersequence	Shortest Common Super Sequence algorithm
Nsorting	Sorting algorithms
Nspirograph
Nstatistics	Statistical algorithms
Nstd	STL namespace
Nstrand	Functions for Strand Sort algorithm
Nstring_search	String search algorithms
Nstrings	Algorithms with strings
Nutil_functions	Various utility functions used in Neural network
Nvigenere	Functions for vigenère cipher algorithm
NXOR	Functions for XOR cipher algorithm