There is probably nothing better for a technical wiki. It's usually bundled as part of the cpanel software on cheap webhosting sites.
For $5/m or less you can have something professional looking, rather than the notion document linked above.
And if your community can't collectively (eventually) cough up $5/m for the hosting costs, then you don't have a community anyway, so it would be pointless having a wiki.
There is probably nothing better for a technical wiki. It's usually bundled as part of the cpanel software on cheap webhosting sites.
For $5/m or less you can have something professional looking, rather than the notion document linked above.
And if your community can't collectively (eventually) cough up $5/m for the hosting costs, then you don't have a community anyway, so it would be pointless having a wiki.