NotSoSecure | Part of Claranet Cyber Security
NotSoSecureisoneofthelargesttrainingprovidersatBlackHatconferencesandtrainshundredsofindividualsthroughouttheyear.Ourtrainersarealsopentestersandweusearesearchledapproachtoensureourtrainingandtestingisalwaysofthehighestquality.
Sphere Online Judge (SPOJ)
SPOJ(SphereOnlineJudge)isanonlinejudgesystemwithover315,000registeredusersandover20000problems.Thesolutiontoproblemscanbesubmittedinover60languagesincludingC,C++,Java,Python,C#,Go,Haskell,Ocaml,andF#.SPOJhasarapidlygrowingproblemset/tasksavailableforpractice24hours/day,includingmanyoriginaltaskspreparedbythecommunityofexpertproblemsettersassociatedwiththeproject.
regex101: build, test, and debug regex
Regularexpressiontesterwithsyntaxhighlighting,explanation,cheatsheetforPHP/PCRE,Python,GO,JavaScript,Java,C#/.NET,Rust.