Vintage Computing and Gaming shared Jason Scott's blog titled 5/"Five Unemulated Computer Experiences" -- "While I and many others work to turn the experience of emulation into one as smooth and ubiquitous as possible, inevitably the corners and back alleys of discussions about this process present people claiming that there are unemulated aspects and therefore the entire project is domed.
Development/Quality Assurance Testing
Idoiocracy's Reddit re(ply/sponse) mentioned his The Making of Games' alphabetical index of all submissions with many links including videos.
TechHive shared a fifteen/15 pages screen capture/shot gallery showing "Relive the 1990s with these ancient, still-functioning websites ... The 1990s were also when most of the public first encountered all the digital magic the 'World Wide Web' (WWW) had to offer. The Internet has been through a lot in the subsequent decades, but you can still visit a number of stubborn vestiges of these primordial days.
MarphitimusBlackimus/Marphy Black/Revenant100's YouTube channel has a playlist, with currently 24 videos and 2.5 hours, showing "Half-Life Fact Files -- Do you want to learn more about Half-Life? To see the obscure? To witness the oddities? Then, you've come to the right playlist!
This GamerSpawn small YouTube playlist "takes you on a trip through the history of some of the world's best game series."
DOS486.com currently has four pages showing screen captures/shots of "The Weird Error Message Gallery" from various software and web sites.
Blue's News shared a cute Flash puzzle game titled "Wrrrmz" on Games For Work and its official web site, Sogood.com -- "A cute, squishy puzzle game about guiding worms with the mouse to their home through a maze of mushrooms. 50 unique puzzles! ..." and "Stretch the worm out to its full length & reach the hole. Later levels include multiple worms."
VideoSift shared a very old 56+ minutes seconds Viddler video (also YouTube) showing "Code Rush" -- "... documentary covering the first release of Netscape source code in 1998, the foundation of the Mozilla project... From March 1998 to April 1999, an independent documentary film crew followed a team of software engineers
EHow UK shows a seventeen/17 slides of "The Internet's 15 greatest hidden gems -- Software developers are a creative lot, and they often like to surprise users with unexpected gifts.