Make one useful decision
Sort an Overflowing Pen Drawer Without Buying More Organizers

Start with function and use, not matching colours. A drawer full of pens that do not write or do not suit your tasks is not a useful reserve.
Test one type at a time
Use spare paper to check a usable line and read the product type. Permanent markers and ordinary writing pens have different jobs. Follow manufacturer guidance for a pen that does not work; do not improvise heating or other treatments.
Define working pens and reserves
A working pen has a real current use. A reserve must be suitable to replace it. Check with the owner before moving or discarding someone else’s supplies. Free promotional pens do not all need a place at the front of the drawer.
Place them by use
Keep the usual pen accessible and reserves in a defined existing space. Distinguish shared household supplies from personal stationery. Decide whether dividers are necessary only after the contents are settled.
An example and a stopping point
In a fictional drawer, ten black pens include only two that suit the planner. The owner chooses one to use and one as a replacement, then reviews whether the others have actual jobs. This is not a universal two-pen limit. Writing successfully and having a reason to retain something are separate tests. Follow local disposal guidance and do not pour ink into a sink.
A note for your own situation
Test result: Actual use: Working location: Suitable replacements:
Keep this with the paper or digital notes you already use. No additional app is required.
For the related next step, see Where to Start Decluttering: One Small Area and a Clear Stopping Point. Choose the guidance that fits the task actually remaining.