Depending on the situation Nexus X-Pegs and X-Hangers provides a solution.
Nexus X-Pegs are easy to hang when a wall is the only options. Each attaches to a wall with a single fastener.
Nexus X-Hangers are great to use on partitions or workspace panels. They attach easily on top of the partition with thumb screws to secure into position. Available in two sizes, depending on the thickness of the partitions.