This is portable version of REAPER. Cockos REAPER is a powerful but sensible Windows application that lets you record, arrange, edit, and render multi-track waveform audio. It provides an extensive set of features, but is a very small and lightweight application (the installer is less than 1 megabyte, and includes many effects and a sample project).
► Basic features:- Portable – supports running from USB keys or other removable media- 64 bit audio engine- Excellent low-latency performance- Multiprocessor capable- Direct multi-track recording to many formats including WAV/BWF/W64, AIFF, WavPack, FLAC, OGG, and MIDI.- Extremely flexible routing- Fast, tool-less editing- Supports a wide range of hardware (nearly any audio interface, outboard hardware, many control surfaces)- Support for VST, VSTi, DX, DXi effects- ReaPlugs: high quality 64 bit effect suite- Tightly coded – installer is just over 2MB

