These are the most user unfriendly programs I've ever seen. with gotomypc all you do is go to the web site and log in. With these programs, there is no web site, no login, whats dns?
I would do apple remote desktop but that requires you to install the app into the other remote computer (I think) and again, isn't web based, which means if Im at a windows comp it wont work.
As far as Im concerned, none of these are gotomypc equivalents.
The Internet's domain name service, which maps domain names to their IP addresses.
If your Internet Service Provider assigns you a dynamic IP address (one that changes from day to day), you can use a free service like dyndns to use a domain name that will map to the current IP address. That way, you (and others you give access to) can refer to your system using the same domain name all the time even though the actual IP address changes.