Microsoft, PalmSource, the OS division of Palm; Symbian and Nokia are among the other major manufacturers that have made similar announcements.
In addition to making the "hardware and software" blueprint available, RIM will offer consulting services, interoperability testing and a certification program.
By announcing a closer relationship with its chip supplier Analog Devices (ADI), RIM will get entry to ADI's customer base that includes more than 25 handset ODMs.
"ADI has the lion's share of independent handset manufacturers after the majors," said Jim Balsillie, chairman and co-CEO at RIM.
The ADI processor is a single chip design that includes both the digital signal processor for communications and the application processor as well as the Sun JVM. ADI optimised the chip for GSM/GPRS wireless networks, according to Balsillie.
The latest RIM models already support Sun's J2ME. But some developers say the RIM environment is still too restrictive.
"RIM is a great device for doing e-mail, but J2ME is fairly limited for handhelds. It's good for the handset market," said Anthony Meadow, president of Bear River Associates.
But on the handset, J2ME appears to be the platform of choice among most of the major handset manufacturers, as well as the carriers with Nokia, Motorola, AT&T Wireless and Nextel, all announcing support for J2ME as the standard for application development.
With a huge diversity of choice as the handset manufacturers try to please millions of consumers, Balsillie insisted Java is the perfect platform.
"Java virtualises the processor so that developers are writing to a virtual processor that allows them to abstract all operating systems and the hardware that is particular underneath. A virtual machine means I don't care what the OS is or hardware is, just give me a common VM," said Balsillie.
Although Palm offers its OS to handheld and handset manufacturers, the difference is that the Palm OS is a particular implementation and does not allow for the same level of product diversification.
"Sun's Java is a specification, not an implementation. Every [piece of] hardware is different. Sun is a spec and a policeman to make sure you adhere to that spec," Balsillie added.
Nevertheless, RIM is increasingly faced with the fact that as packet-based wireless networks become ubiquitous, the always-on capabilities of the RIM, which first attracted many corporate users, is no longer a differentiator.
In particular, the Palm i705, the Handspring Treo, and the many smart phones with the same e-mail capabilities are now in the market.
Pricing and availability have yet to be announced.