I've long been a fan of the all-in-one EveHQ tool. EveHQ did everything that EFT and EveMon and more:

* Skill tracking and planning
* Ship fitting simulation
* Personal/corporate asset tracking
* Order monitoring
* POS simulation
* Industry simulation including T2 invention
* Wormhole effects database
* PI planner

All of these features and a reasonably laid out interface made it my tool of choice for a long time. That is no longer so.

I have stopped using EveHQ and have migrated to EFT and EveMON for my tools. EveHQ has become too frustrating to use due to interface lag, occasional crashes, and massive memory use. After a few hours EveHQ will use as much as 800 MB of memory, which is sometimes more than my EVE clients!

The main issue is interface lag; the program will often fail to maximize or minimize, or take an unusually long time doing so. Switching between tabs or selecting new UI elements can take seconds to respond, or lock the entire program while changing.

It's a shame, because EveHQ has a feature set that nothing else currently offers. But if you can't use it, it doesn't matter how many features you have, does it?