There is a new coin called Yenten that is CPU only and growing popular. You can get a good hashrate with even fairly old computers including laptops. I'm mining it on two laptops and a pretty powerful desktop all running Linux, so you should have no issues. Check here:
https://bitcointalk.org/index.php?topic=2329470.msg23686620#msg23686620for more info and a link to the Github page to download the wallet/miner. You will need to compile both from source but there are instructions given.
don't need to compile any of them, they have the binaries already
other cpu only coins you can try are Magi and Verium
You're right, binaries have been added. That should make it easier for people to get started.
Are those coins really worth it to mine? Are there other coins that can be mine in an old desktop computer? I have old computer that my grandmother used it before. Its windows with low specs.
Hard to say if it's worth it. Right now I'd say it's the best coin to mine with low specs because the algo is specifically designed to offer diminishing returns when using powerful hardware. The price could go up and it could be worth it, or it could die in a few months. People used to say that mining only 1 bitcoin a day was a waste of time and electricity...