So here is a free #mastowall for the #wwdc #wwdc23 event. You can change the hashtags (up to three) by clicking on them at the top right.
https://rstockm.github.io/mastowall/?hashtags=wwdc,wwdc23,apple&server=https://mastodon.social
Sourcecode/host your own: https://github.com/rstockm/mastowall #apple #opensource