NOTE: I do not own the company Aternos or any of its components! I am not responsible for whatever happens. It is UP to you if you trust the website and etc.
Aternos is a free minecraft server service that gets funded with advertisements. You can get up to 10 slots in 1 server. 15 bukkit plugins. also available in modpacks as well, alongside with 400mb. and 300 servers online almost everyday! It is 24/7 if the server uses all of its slots. Sometimes, servers won't be available but thats how it is. This is a good server for adventure maps and is not really intended for public servers. Also this takes the risk away from being DDoSed by hackers or some sort.
I've used aternos for about a week and a half now, and I can say it is pretty good. Here's a little table of what I want vs. what I get
What I want | What I get
Enough slots to fit my friends | Exactly that, 10 slots, which is really all I need
Online 24/7 | Doesn't shut down while someones on but not 24/7, also
| Have to wait in a queue to start. Usually 1 minute but on weekends | Fridays it's about an hour
As many plugins as I want | Sadly, only 15, and have to pick and choose from a list.
Fun | Fun
FREE | FREE!
Overall, it's pretty good. Doesn't really lag, my friends can play, but the queue thing and not being online 24/7 is annoying. I'd suggest this server hosting for anyone who just wants to have some fun with their friends. I'd suggest using it mainly on weekdays as that's where the queue time is the shortest. I have fun on it and I bet pretty much anyone will. 10 slots is really all you need. Also one time things like parties work really well. May take about 5-10 minutes to set up your account and install the plugins, and get configured with the controls, but hey, it's simple and easy.