F5’s BYOL (Bring Your Own License) model allows you to purchase a developer/lab license and install it in your VMware infrastructure. This model provides a stable development instance for the following software components of BIG-IP: LTM, GTM, DNS, AFM, ASM, APM Lite (10 users), AAM, CGN, SSL Forward Proxy, Advanced Protocols, and Crypto Offload all at a 10Mbps rate limit.

Please refer to these resources to get started with VMware vCloud Director and ESX(i)

How to get a F5 BIG-IP VE Developer Lab License
BIG-IP Virtual Edition Setup Guide for VMware vCloud Director @ support.f5.com
BIG-IP Virtual Edition Setup Guide for VMware ESXi v12.0 @ support.f5.com (PDF)

NOTE: DevCentral recommends no less than 4GB RAM and prefer 8 to 24 depending on what modules requiring activation (the more the merrier right?). For Developer environments, you can deviate from staging and production requirements allowing you develop applications and solutions across multiple BIG-IP modules. DevCentral uses multiple vm’s each with standardized configurations found in BIG-IP’s product catalog to ensure that we don’t produce unsupportable materials for ingestion by the community. You can do whatever you want!

Deploying F5 BIG-IP in VMware vCloud Director and ESX for Developers