Keypirinha - A lightning fast and flexible keystroke launcher for Windows. No installation required (portable).
Torchie - Touch to Torch
Synapse - Synapse is a semantic launcher written in Vala that you can use to start applications as well as find and access relevant documents and files by making use of the Zeitgeist engine.
Simple Flashlight - A clean flashlight with an extra bright display and customizable stroboscope.
DockbarX - DockbarX is a standalone dock that groups and launches applications.
Screen Torch Advanced 2 - "Screen Torch Advanced 2", is an handy torch program. It only uses devices' backlight.