I like training static and slow movements for climbing. I feel it translates the best to actual climbing.

I usually find a pull up bar and just do a lot of different grip width variations. Some narrow grip, some shoulder width, and some as wide as I can. All of them are done slowly and controlled, so I don't jerk myself up. I start from a complete dead hang position, slowly pull myself up, and even more slowly lower myself back down.

I also try to pull myself further up, so that I am in between a regular pull up and muscle up.

Training one arms is probably my favorite though, it also really requires very minimal gear, basically just a pull up bar.

Anything body weight and slow movement helps me, so pull ups, push ups, handstands, etc.