Meta Tags - Meta Tags is a tool to debug and generate meta tag code for any website.
DSpace - DSpace open source software enables open sharing of content that spans organizations, continents...
GupShop - Avoid fake reviews and Get suggestions from your friends to buy best products.
Invenio - Invenio is a free, open-source software to run a digital library or document repository on the web.
Primo - Like Amazon's 1-click shopping--but for everything
Koha - Koha is the first free and open source software library automation package (ILS).