wdHash is a simple content-plugin for that is intended for calculation of checksums (hashes) for any file.
wdHash can initially calculate checksums using the CRC32, MD5 and SHA1 algorithms. But one of the key feature of this plugin is that amount of supported algorithms can be easily increased by adding extra second-level plugins. One can download a number of additional second level plugins from the homepage of the wdHash (http://slsoft.narod.ru/wdhash.html). There are plugins that add support of various modifications of the such algorithms as Haval, RipeMD, SHA, MD, Tiger, etc.
The second feature of the wdHash is its ability to work in a background. This makes its usage more convenient and allows to reduce delays when waiting for calculation of hashea in such situations as calculation of long checksums of files having the big size.
For a while wdHash can calculate checksums only. But if the community will be interested in it, it will be possible to add new features. I'm ready to get requests and suggestions and take part in discussions.

One can find links to the wdHash on totalcmd.net.