Marshal
The Security Checklist
Probe.ly
Gold Fig Checkup
Google Security Scanner
Lucidscale
SourceClear
Indusface AppTrana
kdiff3
Beyond Compare
WinMerge
Meld
Araxis Merge
DiffMerge
P4Merge
Devart Code Compare
Marshal
kdiff3The Security Checklist - The Practical Security Checklist for Web Developers
Beyond Compare - Beyond Compare allows you to compare files and folders.
Probe.ly - Intuitive and easy-to-use webapp vulnerability scanner
WinMerge - WinMerge is an open source differencing and merging tool for Windows.
Gold Fig Checkup - Lighthouse for your AWS infra security and best practices
Meld - What is Meld? Meld is a visual diff and merge tool targeted at developers.