Free for Open Source Projects

• Code Spaces - Includes issue tracker and is free for single users and open source projects.
• Google.
• Sourceforge.
• BerliOS Developer - Free hosting for open source projects.
• CVSDude - Free and commercial Subversion and CVS hosting.
• Python-Hosting.com - Subversion and Trac hosting, free for open-source python projects. Paid for hosting for all types of projects.
• gna.org - Open Source only.
• Bounty Source - Open Source only.

Free for All Projects

• Assembla provides a Subversion/Trac service which is free. You control access so private developments can be hosted. There is an explanation of why it is free.
• Beanstalk offers a free limited service, and will be offering paid for services.
• XP Development Tools

Commercial

• A2 Hosting - testimonials on their site.
• Slik Subversion hosting, there is a free account with very limited storage.
• LCube - a German site offering Subversion hosting.
• Springloops which is aimed at web developers.
• Unfuddle has a free basic account.
• Clearvision offer hosting and support for Subversion.
• Versionshelf offers effortless and secure Subversion Hosting. Versionshelf has a streamlined webinterface to configure and access repositories, users, ACLs, rss feeds, external commit triggers, backups, ... easily. Access is always secured through secure 128-bit SSL data encryption.
• Hosted Projects - Several Subversion hosting plans.
• ProSVN - Has a free option. Also hosts Trac.
• TextDrive - A range of hosting options and an offsite backup service.
• Dreamhost - Webhosting plus subversion
• GeekISP - Webhosting plus subversion details here
• AVLUX - Webhosting which includes Subversion repositories.
• DevGuard - affordable, fast, secure and easy.
• SourceHosting.net, LLC - Commercial Subversion hosting, Bugzilla hosting, professional services and Subversion technical support contracts
• CVSDude - Free and commercial Subversion and CVS hosting.
• ObjectWeb - Open Source Middleware. GForge hosting.
• hosted-projects.com - Commercial hosting from small repositories to dedicated hosting servers.
• wush.net - Professional Subversion and Trac hosting. Plans ranging from personal accounts to managed servers.
• ProjectLocker - Managed source control solution with no pre set limit on the repository size.
• Projxpert - Professional Software Project Hosting. Manage multiple projects, forums, manage their issues, requirements and version control with minimal fuss.
• CollabNet - Distributed Development On Demand. See CollabNet CollabNet Subversion On Demand for smaller scale use.
• The File High Club offers professional Subversion hosting, concentrating on security and reliability. We even have a free trial so you can try our augmented service for yourself.
• Assembla offers free Subversion and Trac hosting for all projects. It also include many other tools for building and managing distributed software teams.
• svn.it-projects.com Provides enterprise-class, secure and fully backed up hosting services for Subversion and Bugzilla
• 8svn provide a pay as you go Subversion hosting service.
• Weble is not en English language site so if you read Belgian please add a comment describing this service.
• SSH Control provides Git, Mercurial (hg), and Subversion (svn) service over SSH commercially.

Virtual Servers provide a powerful way to host subversion repositories.