A lightning fast and flexible keystroke launcher for Windows. No installation required (portable). Extensible with Python3 plugins.
GNOME Do allows you to quickly search for many items present on your desktop or the web, and perform useful actions on those items.
The program seems to be no longer updated. Last version, 0.95.3, released on November 2014, can be still downloaded from Launchpad.
FARR also lets you quickly run web searches, send email, manipulate files, control on-screen windows, and much more. Build and share custom commands or install plugins to add tons of new features, like live search features for your clipboard history and your internet bookmarks;...
PStart is a simple tray tool to start user defined applications. Designed to run portable applications, you can start anything runnable from USB key devices or removable disks.Discontinued
nothing since 2007
SlickRun is a free floating command line utility for Windows. SlickRun gives almost instant access to any program or website. SlickRun allows you to create command aliases (known as MagicWords), so C:\Program Files\Outlook Express\msimn.exe becomes MAIL.
ASuite is a simple open source portable launcher for Microsoft Windows. Designed to run portable applications, you can start anything runnable (software, documents and other file types) from removable storage media (USB keys, hard drives, iPods, etc.).
Avant Window Navigator (AWN/Awn) is a dock-like navigation bar for the linux desktop that positions itself at the bottom of the screen. It can be used to keep track of open windows and behaves like a normal window list.Discontinued
Doesn't seem to be activaly maintained anymore. Last update was in 2017.