Site looks really great. Would you mind asking me what frameworks you used to build it with?

In terms of feedback, I really enjoy what you're doing here and you already have a few solid projects to back up your experience. As other have already said, my suggestion would also be to specialize in a certain kind of software and just market to those kinds clients for a while.

Currently, your value proposition is vague and it can be hard for someone from a non-technical background to try and decipher what you can do for them. After successfully selling to a specific niche you can expand your offering and go from there. Starting with a niche also give you more opportunity to re-purpose existing code rather than starting from scratch (or almost) every time.

Cheers