Blogcomments
Free self-hosted commenting system with an ASP base. Layout can be customized using CSS.
BlogExtra BackBlog
Feedback system for bloggers and web page owners. It allows feedback from readers for entries you write in your blog or web page. backBlog has two versions: backBlogBasic - which is free - and backBlogPro - which offers enhanced features.
BlogKomm
Free commenting script displays comments below posts rather than in pop-ups.
CGI Comments
requires CGI. A perl based commenting system for use with weblogs.
DocumentRoot Weblog Tools
Free weblog commenter and counter tool.
DoodleBoard
Let your site visitors add photos and text comments with a remotely hosted message board.
DotComments
Server-side, requires PHP. Has its own support email list.
HaloScan
Free, easy to install weblog commenting system allowing webmasters to receive feedback on their website.
Installing CGI Comments
Tutorial by Raymond Gan.
Pollxn
A lightweight discussion engine for Blosxom and other weblog/blogging applications. It lets people post comments about your blog stories right on your site.
Reblogger
A comment system for weblogs that can be used as a remote commenting system or can be installed on any server with cgi capability and perl.
Snorcomments2
A script programmed in perl that can be run on most web servers with cgi capabilities.
Tag-Board
Free message board for blog webmasters wanting to communicate with users. Displays inline comments.
Tara Star's Script
Requires PHP. Notifies the weblog's owner when new comments are posted.
YACCS
Free remotely-hosted commenting. Available in multiple languages and does not require JavaScript. Users can edit and delete posts, and ban IP addresses.