Subversion is an open source version control system. This integration will post commits to a channel in Slack.
Alternatives to Subversion
Subversion is listed in: Source Control
Source control and code management.
Free source code hosting for Git and Mercurial.
Collaborate and manage software projects online.
A programmer's best friend, now in Slack.
XP-Dev.com posts repository events to your Slack channels
Custom rules for Github repos and violation monitoring
On-premise source code management for Mercurial, Git & SVN