This was necessary to bring the module naming in line with other common module names on github.com/silverstripe and github.com/silverstripe-labs. They were created before the "silverstripe-" prefix naming convention were established, hence the rename.
Sorry for any inconvenience this might cause!

Before:
git://github.com/chillu/recaptcha.git
git://github.com/chillu/tagfied.git
git://github.com/chillu/genericviews.git

After:
git://github.com/chillu/silverstripe-recaptcha.git
git://github.com/chillu/silverstripe-tagfied.git
git://github.com/chillu/silverstripe-genericviews.git

The download paths on silverstripe.org are already updated, if you get your module downloads from there you shouldn't need to change anything.

Thanks
Ingo