Volunteers for Salesforce helps manage your volunteer events and people. It manages volunteers, jobs, shifts, and hours, allowing you to track and report on all of the data as well as allow public signups via Sites pages on your website.
Auctions for Salesforce 4.11 (March 2016) helps staff manage all the information related to an auction. It tracks tickets, sponsorships, donations, the bundling of donations into auction items, purchases, and handles Check In & Check Out at the event.