Open Unified Process

Probably everyone have listened about Unified Process and all the variant process related to that. The OpenUP is also something based on the Unified Process:

What is OpenUP?
OpenUP is a lean Unified Process that applies iterative and incremental approaches within a structured lifecycle. OpenUP embraces a pragmatic, agile philosophy that focuses on the collaborative nature of software development. It is a tools-agnostic, low-ceremony process that can be extended to address a broad variety of project types

Take a look on this documentation, it can be a reference for you: OpenUP