Focused crawls are collections of frequently-updated webcrawl data from narrow (as opposed to broad or wide) web crawls, often focused on a single domain or subdomain.
Gword is a web app that generates all possible combinations of letters that make up an english word when provided by a set of letters and a limit. It is written in Go and utilizes Websockets.
Two programs that illustrate the creation of OEIS array A089840, which lists signature permutations of non-recursive Catalan automorphisms, that is, bijections of finite plane binary trees, with no unlimited recursion down to indefinite distances from the root.
Alpha-Binary Generator is fastest sequential binary generator for C. it can generate binary to FILE or to console at great speed 4x times speed than normal generator.
Permutations can be considered as the orbits of a dynamic system p' = succ(p), where p is a permutation and p' is its successor in the lexycographically ordered set of permutations (plus the Nil permutation, whose successor is Nil). Here I present a function that produces those orbits as well as a number of "permutation numbers" derived from those orbits.