Old school glue, still gets used in places
What model builder isn't familiar with this stuff? Very hot, and provides a nice strong joint if used correctly. Because it's a gel, some skill is required applying it so you don't end up with a mess. I only use it on major joints that will get filler and/or sanding. Because it's so hot, you can soften up a joint, press together with force, and (after scraping or sanding) eliminate gaps. Does have the ever present problem with metal foil tube glues of a very light squeeze results in too much glue. Only looses one star because there are easier glues to use. I'd like to see this stuff in sold in a jar.
Great Cement
This cement is a good cement for NON-DETAIL gluing. it's still a bit too thick for fine pieces and will glob up on you otherwise. For gluing large surface area pieces together, it works amazing. For finer detail things, I prefer to use something liquidy, Like PlastiWeld, or Tamiya Extra Thin Cement. It's a bit more expensive, but it lasts you a great deal of time.
Plastic Cement Tube 5/8 oz.
This is plastic cement that comes in a tube, its bonding is better than non toxic glue. It is very thick, but the tube tends to flow out more glue than what is needed. The glue melts most plastic (except for ABS). Preferably, I would put some on a cardboard piece and then apply the glue with a toothpick.