Perforce is described as 'The Perforce Software Configuration Management System features comprehensive SCM capabilities built around a scalable client/server architecture. Users can access the Perforce Server through a range of Perforce client software' and is an app in the Development category. There are more than 25 alternatives to Perforce for a variety of platforms, including Windows, Linux, Mac, Online / Web-based and Haiku. The best alternative is Git, which is both free and Open Source. Other great apps like Perforce are Git for Windows (Free, Open Source), Apache Subversion (Free, Open Source), Mercurial SCM (Free, Open Source) and Fossil (Free, Open Source).
Git for Windows focuses on offering a lightweight, native set of tools that bring the full feature set of the Git SCM to Windows while providing appropriate user interfaces for experienced Git users and novices alike.
Mercurial is a free, distributed source control management tool. It efficiently handles projects of any size and offers an easy and intuitive command line interface. Mercurial efficiently handles projects of any size and kind.
ZenTao is an open source project management tool, supporting Scrum. It integrates product management, project management, bug management and QA management, etc., covering all lifecycle of software development.
Bazaar is a tool for helping people collaborate. It tracks the changes that you and other people make to a group of files - such as software source code - to give you snapshots of each stage of their evolution.
Darcs is an advanced revision control system, for source code or other files. It is fully distributed, and supports lazy fetching of the remote repository (fetching only what is needed at the time, rather than all history).