A selection of my free open-source Magento extensions:
Display a baseprice, e.g. "equals 1,20 € per Kg".
Require customer accounts to be activated by the administrator
Visibility of categories and products by customer-group.
Customers have to log in to view categories and products.
Image names from product attributes (SEO)
An alternative vertical category navigation in the left column.
A few commercial extensions:
Improved configurable products for Magento.
Select configurable product options by swatch images
Baseprice for product options with price-updates
Transfer orders from Magento to Afterbuy
The commercial extensions are delivered as open source, the source code is readable.
Two of my t3n Articles are available online:
I hope to be able to expand this list when time permits.