i've seen a few including the littles, gargoyles, rescue rangers, and talespin. are there others toons that run on tv?

On local Puerto Rico TV, there's, on present day, the Cinar Little Lulu series, a syndicated Flinstones series (based on the one with the Frankenstones and Captain Caveman), and the Carmen San Diego cartoon.

The Tick and Dungeons & Dragons are shown on Toon Disney.

Well let's see here, I'll start with the 80s:

My local channel Your TV20 (WB20) plays "The Littles" at 7:00 am on Saturdays (I have recordings from those airings) along with: Liberty's Kids and Strawberry Shortcake.

Qubo which is a programming block that airs on NBC, Teletoon, and the "i" channel (which recently got a 24/7 channel) plays Babar which is from 1989. That show doesn't interest me that much but it's a cartoon and it's from the 80s.

Boomerang plays still plays some 80s cartoons. They air: The Smurfs, The Snorks, Heathcliff and Marmaduke, Dennis the Menice (Boomerang's most recent 80s cartoon premired this year in 2007), and Richie Rich. They are gonna show Garfield and Friends on the network again after being taken off in 2006 about 3 months after it first aired on Boomerang.

Toon Disney has recently brought back: Ducktales, Talespin, and Chip and Dale's Rescue Rangers. However on JETIX they air Dungeons and Dragons. They used to show Spiderman and his Amazing Friends but it was taken off the air.

I think Cartoon Network airs Voltron but it's at 5:30am.

That's about all I could name, now for the 90s:

On the 24/7 version of qubo they show Rupert the Bear. Although this is not a cartoon, they also show Lamb-Chop's Playalong.

Nicktoons Network shows some of the 90s Nicktoons but they are mostly at 12:00am-6:00am. One of the only Nicktoons that airs at decent times are Ren and Stimpy.

Toon Disney shows: The Tick. I don't know about the other Marvel cartoons such as Spiderman, X-men, The Fantastic Four.

Boomerang airs 90s shows such as: Dexter's Laboratory and 2 Stupid Dogs. Wikipedia said that this April that they will air: Cow and Chicken. I don't have an official source about Cow and Chicken but we shall find out.

Cartoon Network still shows: Ed, Edd, N' Eddy. Even though there's episodes made in the 2000s. Hey, it was made during the 90s, right?

Nickelodeon still shows Spongebob which is from 1999 so technically it's a 90s cartoon. Also Nickelodeon still shows Rugrats episodes at 6:00am. Rugrats was made in 1991 even though there's episodes being made in 2000. They still show the classic Rugrats episode which is good. Sometimes I would see The Wild Thornberrys at 6:00am.

Also even though it premired in 1989. The Simpsons still airs 90s and 2000s episodes (even though I see mostly 2000s episodes). My local network CW44 (UPN44) airs some 90s episodes sometimes.

Not really a cartoon but reruns of Beakman's World air on the CW
and Archie's Weird Mysteries airs on the Fox
The Simpsons are still going strong
also not really a cartoon Reading Rainbow is still on PBS
also Sesame Street
reruns of Timon & Pumbaa, Little Mermaid The Series, and Buzz Lightyear Of Star Command air on the Disney Channel.
I think the old Davey & Goliath series airs on one of those religious channels.
reruns of Space Ghost Coast 2 Coast, Sealab 2021, and The Brak Show airs every once in a while on latenight AdultSwim

Since I don't get Toon Disney, Boomerang, or Nick Toons...there are no 80's cartoons on any channel I get, and hardly any 90's ones (except for a few from the late 90's). At least most of my favorite old shows are being put on DVD.

inspector Gadget still runs on YTV.

Jetsons and flintstones are still on Teletoon from time to time.

I forgot about The Simpsons, which has been in Puerto Rican TV since 1991, and it's still a ratings winner!

But most episodes are the 90's reruns, with the 2000 ones shown rarely.

captain planet is on sometimes (reruns) that show was so sweet

while it's not currently on, YTV Does air Reboot from time to time.

Stickin' around still airs on YTV.