Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
One of the best productivity tools I had when I used Microsoft Windows was a collection of portable applications. I missed those tools when I migrated to Linux. Now several open source projects could make portable apps available to mainstream Linux users.
Three websites are trying to create that functionality. But the efforts might need more work before they all perform well out of the box. I found that being able to get these portable apps to run is largely hit and miss. Sadly, my testing showed that it is mostly miss.
I was initially very excited over the prospect of having a toolkit of already-configured software programs at my fingertips. I would not have to worry about maintaining separate installations of the same software on any Linux-based computer I used.
In practice, however, my enthusiasm for portable Linux apps is waning. I'm fairly experienced at setting up and configuring Linux installations. My efforts with portable apps has not been very successful.