Using a good code reviewer can help a programmer to a great extent by increasing the quality and decreasing the chances of errors in the program code. A good code review tool should be very specific about the potential errors and the review output is of quality and easy to manage
20 Best Code Review Tools for Developers
Reviewale is new code review tool in the market, it helps to improve code quality with syntax highlighting, find bugs/issues, make code better, clean UI, customize code font and many more.
RhodeCode is another great tool for review your code and find the bugs and issues in code and also removes after reviewing the code.
Code Striker is free & open source web application that help developer to web based code reviewing. Developers canensures that issues, comments and decisions are recorded in a database, and provides a comfortable workspace for actually performing code inspections.
Phabricator is an open source software and web applications including code review, hosting GIT/Hg/SVN, find bugs, browse and audit source code, etc.
Gerrit is a web based code review system, facilitating online code reviews for projects using the Git version control system.