I had problems with Subversion 1.5 (used against a 1.4.6 repository). E.g, my process would completely freeze up on doing a "svl log" command.

I reverted to 1.4.6 on the client and all is well again. So - even though Collabnet claims compatability with an uplevel client - I don't believe it.

You can download the 1.4.6 version from this page.

Quoted: CollabNet Consulting Services cover a wide range of business and technology topics designed to accelerate the roll-out and adoption of CollabNet. Services include subversion services, community services, open source consulting, Collaboration and Program Management.

Derek's extensive post debunking arguments against distributed version control systems. Really good food for thought here.

Quoted: Taking on some of the DVCS FUD.

Linus Torvald's apology for DVCS systems - really good arguments - esp. for large projects with many interested parties with different goals and needs for the project.

The distributed version control system used by the Linux Kernel.

Quoted: Home of the Git Version Control System and Friends

Easy to use windows shell extension client for Subversion.

Quoted: A Subversion client, implemented as a windows shell extension.
...
TortoiseSVN is a really easy to use Revision control / version control / source control software for Windows.
Since it's not an integration for a specific IDE you can use it with whatever development tools you like.
TortoiseSVN is free to use. You don't need to get a loan or pay a full years salary to use it.