Online Pen-Testing sites, do not offer complete and thorough reports of all security pitfalls, like the ones that can be found using traditional penetration testing methods and tools, but they do offer a kick start for information gathering and vulnerability analysis. They are helpful, but we can not rely on any one site to provide all required info. Sometimes, we will also find that we can get contradictory reports from different apps and sites concerning our target.
PenTest-Tools – Another great online utility for beginners
CentralOps – Very basic (almost old) feel and look, and easy to use
ACUNETIX – One of the favorites for many Information Security Pros and Beginners, with choice to download or do testing online
Cyb3rS0ft 