It has been a long time coming, but I am excited to announce that the Prattski Magento Extension Store is now live. At this time, we only have 2 extensions listed, but we hope to add more in the near future.
Dependent Filters: This extension adds on option on the attribute edit view that allows you to select dependencies from a list of existing filters. When dependencies have been set, the filter will not show up on the front end until one of the selected dependencies have been selected. This extension currently does not support the price filter or category filter.
Import/Export URL Rewrites: This extension gives you an easy interface to import/export Custom URL rewrites. As of this current version, please note that it does not yet import/export System rewrites.