IDA Pro is an interactive, programmable, multi-processor disassembler. Plus, in addition to being a disassembler, IDA is also a powerful and versatile debugger. It supports multiple debugging targets and can handle remote applications, via a 'remote debugging server'.
Hex-Rays continues to develop and support the IDA disassembler. This famous software analysis tool, which is a de-facto standard in the software security industry, is an indispensable item in the toolbox of any serious software analyst. Hex-Rays will continue to maintain IDA and ensure its continuous evolution.