There are lots of examples of manual log splitters, all designed to make the task of preparing your logs a lot easier, the Handy 8 Ton Manual Log Splitter by The Handy company is an example of such a tool. In my own experience the hydraulic designs are better for larger quantities of wood and knotty woods as the hydraulic action takes the strain off you.
The Handy 8 Ton Manual Log Splitter
Ram force - 8 ton; 13 pumps for full travel, Adjustable splitting beam; Max long length - 23"/58.4cm, Easy to use foot pedal; 2 speed cylinder for fast ram travel, Heavy duty splitting wedge, Weight 29kg
Manual log splitters are available in various models, some are hydraulic and provide a greater splitting force, you just need to ask yourself the number of logs are you preparing to split and then buy a design to match your requirements, the Handy 8 Ton Manual Log Splitter might or might not be appropriate for you, only you can choose.