Try Omeka
free for 2 months.
Credit card required for signup, but you won't be billed until your trial ends.
You can use your personal credit card when trialing for your institution, and switch to company payment when you sign up for a full plan (company card, check, or purchase order). Just contact us when you're ready to go on to a full plan.
Trial plans are intended to act as your own personal "sandbox" while you try out the software we host. In order to receive full backups, technical support, data migration, branding services, and other benefits, please sign up for a paid plan.